2020年第1期Ei收录情况
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1.---------------------------------------------------------------

Accession number: 20201508382549

Title: Determination and Fitting of Solubility of Dinitamide Salts

Title of translation: 二硝酰胺盐溶解度的测定及拟合

Authors: Dai, Yun ; Li, Bin-Dong

Author affiliation:

School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing; 210094, China

Corresponding author: Li, Bin-Dong (libindong@njust.edu.cn)

Source title: Huozhayao Xuebao/Chinese Journal of Explosives and Propellants

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 1

Issue date: February 1, 2020

Publication year: 2020

Pages: 33-38

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: In order to select suitable solvents as reaction medium and recrystallization solvent of dinitramide salts, the solubilities of three dinitramide salts, namely, N-guanylurea dinitramide (FOX-12), potassium dinitrate (KDN) and ammonium dinitramide (ADN), in different solvents were determined by UV spectrophotometry. Apelblat equation and ideal solution model were used to fit the solubility data, and the thermodynamic data of the dissolution of dinitramide salts in different solvents were further calculated. The results show that the solubility of FOX-12 in water and KDN in ethanol solution varies significantly with temperature, and thus these two reagents can be used as solvents for recrystallization of FOX-12 and KDN, respectively. In ethanol, the solubility of ADN is greater than 10g because of hydrogen bond, while the solubilities of FOX-12 and KDN are less than 1g at room temperature. The fitting degree R of Apelblat equation is above 0.990, and the average relative deviation (ARD) is less than 2%, showing that the Apelblat equation can correlate the solubility data well.The enthalpy change and Gibbs free energy are all greater than 0 for three kinds of dinitamide salts dissolving in water, ethanol, isopropanol, ethanol/water and N-butanol, showing that the dissolution of dinitramide salts are the non-spontaneous endothermic process.

? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 16

Main heading: Potassium compounds

Controlled terms: Dissolution - Ethanol - Free energy - Gibbs free energy - Hydrogen bonds - Organic solvents - Recrystallization (metallurgy) - Salts - Solubility

Uncontrolled terms: Ammonium dinitramide - Different solvents - Endothermic process - Ethanol solutions - Guanylurea dinitramide - Relative deviations - Thermodynamic data - UV spectrophotometry

Classification code: 531.1 Metallurgy - 641.1 Thermodynamics - 801.4 Physical Chemistry - 802.3 Chemical Operations - 804.1 Organic Compounds

Numerical data indexing: Mass 1.00e-02kg, Mass 1.00e-03kg, Percentage 2.00e+00%

DOI: 10.14077/j.issn.1007-7812.201904003

Database: Compendex

Compilation and indexing terms, ? 2020 Elsevier Inc.

2.-------------------------------------------------

Accession number: 20201508382540

Title: Developments of Additive Manufacture Technology in Propellants, Explosives and Pyrotechnics

Title of translation: 增材制造技术在火炸药成型中的研究进展

Authors: Yang, Wei-Tao ; Xiao, Xia ; Hu, Rui ; Yang, Jian-Xing ; Zhao, Yu-Hua ; Wang, Qiong-Lin

Author affiliation:

Xi'an Modern Chemistry Research Institute, Xi'an; 710065, China

Corresponding author: Wang, Qiong-Lin (wangqionglin356@126.com)

Source title: Huozhayao Xuebao/Chinese Journal of Explosives and Propellants

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 1

Issue date: February 1, 2020

Publication year: 2020

Pages: 1-11

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: According to the technical characteristics and application directions, the domestic and foreign research status of additive manufacturing technology in propellants, explosives and pyrotechnics are summarized. The principle, process characteristics and application of material jetting, material extruding, vat photopolymerization in propellants, explosives and pyrotechnics fabrication are generalized. Meanwhile, the material characteristics of energetic materials used in additive manufacture are introduced, and the development direction of material manufacturing technology is predicted. It is pointed out that the additive manufacture technology of propellants, explosives and pyrotechnics should be systematically studied according to the application background, and the energy characteristics, mechanical properties, energy release characteristics and process adaptability of formulations (ie. consumables) should be systematically studied to meet different application development needs. With 97 references.

? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 97

Main heading: Explosives

Controlled terms: 3D printers - Additives - Industrial research - Photopolymerization - Propellants

Uncontrolled terms: Additive manufacture - Additive manufacturing technology - Application development - Development directions - Energy characteristics - Manufacturing technologies - Material characteristics - Process characteristics

Classification code: 741.1 Light/Optics - 745.1.1 Printing Equipment - 803 Chemical Agents and Basic Industrial Chemicals - 901.3 Engineering Research

DOI: 10.14077/j.issn.1007-7812.201907033

Database: Compendex

Compilation and indexing terms, ? 2020 Elsevier Inc.

3.-------------------------------------------------

Accession number: 20201508382593

Title: Effect of Binder on the Properties of CL-20/FOX-7-based Polymer Bonded Explosive

Title of translation: 黏结剂对CL-20/FOX-7基PBX性能的影响

Authors: Li, Xiao-Dong ; Sun, Hong-Yan ; Song, Chang-Gui ; Zhang, Xi-Ming ; Yang, Wu ; Wang, Jing-Yu

Author affiliation:

School of Environment and Safety Engineering, North University of China, Taiyuan; 030051, China

Science and Technology on Electromechanical Dynamic Control Laboratory, Xi'an; 710065, China

Source title: Huozhayao Xuebao/Chinese Journal of Explosives and Propellants

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 1

Issue date: February 1, 2020

Publication year: 2020

Pages: 51-56

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: To study the effect of different binders on the properties of CL-20/FOX-7 -based polymer bonded explosive(PBX), four kinds of CL-20/FOX-7-based PBX were prepared by solvent-slurry method using Estane, EPDM, ACM and EVA as binders, respectively. The crystal structure, morphology and thermal decomposition properties of the samples were characterized by scanning electron microscopy (SEM), laser particle size analyzer, X-ray diffractometry (XRD) and differential scanning calorimetry (DSC). The mechanical sensitivity and cook-off characteristics were tested by impact sensitivity tester, friction sensitivity tester and small-scale cook-off test equipment. The results show that the molding powder of CL-20/FOX-7-based PBX using EVA as binder is compact, and the surface of the PBX with EVA is smooth without debonding, revealing the best bonding effect in these PBXs.The activation energy of CL-20/FOX-7-based PBX with EVA binder is 87.75kJ/mol and 42.52kJ/mol higher than that of refined CL-20 and FOX-7, respectively. It indicates that the thermal stability of the PBX with EVA as binder is improved compared with the raw materials. Compared with the refined CL-20, the characteristic drop height of impact sensitivity of the PBX with EVA binder is 25.6cm higher, and the probability of friction sensitivity explosion is reduced by 52%.Simutaneously, the mechanical sensitivity of PBX samples with EVA binder is lower than explosvies with Estane, EPDM and ACM binders. Under the condition of small-scale cook-off test at a heating rate of 6K/min, the cook-off response level of PBX with EVA binder is burning, indicating that it can meet the requirement of safety test of cook-off and it has the cook-off resisitant characteristics.

? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 23

Main heading: Binders

Controlled terms: Activation energy - Crystal structure - Debonding - Decomposition - Differential scanning calorimetry - Equipment testing - Explosives - Friction - Morphology - Particle size - Particle size analysis - Safety testing - Scanning electron microscopy - Thermodynamic stability - X ray diffraction analysis

Uncontrolled terms: Decomposition property - Different binders - Friction sensitivities - Impact sensitivities - Laser particle size analyzer - Mechanical sensitivity - Polymer bonded explosives - Response levels

Classification code: 641.1 Thermodynamics - 802.2 Chemical Reactions - 803 Chemical Agents and Basic Industrial Chemicals - 914.1 Accidents and Accident Prevention - 933.1.1 Crystal Lattice - 944.6 Temperature Measurements - 951 Materials Science

Numerical data indexing: Percentage 5.20e+01%, Size 2.56e-01m

DOI: 10.14077/j.issn.1007-7812.201901024

Database: Compendex

Compilation and indexing terms, ? 2020 Elsevier Inc.

4.-------------------------------------------------

Accession number: 20201508382559

Title: Preparation and Characterization of Spheroidized TKX-50

Title of translation: 球形化TKX-50的制备及性能表征

Authors: Mi, Deng-Feng ; Zhang, Rui ; Zhang, Xuan ; Li, Zhi-Hua ; Wu, Xiao-Qing

Author affiliation:

College of Science, North University of China, Taiyuan; 030051, China

Gansu Yinguang Chemical Industrial Group Co. LTD, Baiyin; Gansu; 730900, China

Corresponding author: Wu, Xiao-Qing (1369680249@qq.com)

Source title: Huozhayao Xuebao/Chinese Journal of Explosives and Propellants

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 1

Issue date: February 1, 2020

Publication year: 2020

Pages: 64-68

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: To improve the fluxion property, reduce the mechanical sensitivity, increase the charge density, and enhance the safety of dihydroxylam monium 5, 5'-biste-trazole-1, 1'-diolate (TKX-50), the spheroidized TKX-50 was prepared by a cooling crystallization method combined with ultrasonic-assisted technology. The effects of solvents, cooling initial temperature, cooling rate and ultrasonic time on the morphology of TKX-50 crystals were studied. The morphology and structures of the spheroidized TKX-50 were characterized by scanning electron microscope, laser particle size analyzer, Fourier infrared spectrometer, nuclear magnetic resonance instrument and X-ray diffractometer. The thermal decomposition properties were tested by differential scanning calorimeter(DSC), and the mechanical sensitivities were tested by impact sensitivity meter and friction sensitivity meter, respectively. The results indicate that under the condition of acetone and DMSO with a mass ratio of 1:4 as solvent, configuring saturated solution at 65 , and naturally cooling to room temperature followed with 15 minutes ultrasonic time, the spherical TKX-50 is prepared with diameter of 171.515 μ m.The prepared spherical structure of TKX-50 has not been changed. The friction sensitivity is 64%, impact sensitivity is 16% and the decomposition temperature is 248.22 , which are slightly higher than those of the raw material.

? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 11

Main heading: Cooling

Controlled terms: Acetone - Crystallization - Decomposition - Differential scanning calorimetry - Friction - Morphology - Particle size - Particle size analysis - Scanning electron microscopy

Uncontrolled terms: Cooling crystallization - Decomposition property - Decomposition temperature - Differential scanning calorimeters - Friction sensitivities - Laser particle size analyzer - Mechanical sensitivity - Morphology and structures

Classification code: 641.2 Heat Transfer - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804.1 Organic Compounds - 944.6 Temperature Measurements - 951 Materials Science

Numerical data indexing: Percentage 1.60e+01%, Percentage 6.40e+01%, Time 9.00e+02s

DOI: 10.14077/j.issn.1007-7812.201911007

Database: Compendex

Compilation and indexing terms, ? 2020 Elsevier Inc.

5.-------------------------------------------------

Accession number: 20201508382569

Title: Research on Behavior of Steel-coated Reactive Materials Fragment on Penetrating Double-layer Aluminum Plates

Title of translation: 钢包覆式活性破片侵彻双层铝靶的行为特性研究

Authors: Peng, Jun ; Li, Biao-Biao ; Yuan, Bao-Hui ; Sun, Xing-Yun ; Yang, Qing

Author affiliation:

Xi'an Modern Chemistry Research Institute, Xi'an; 710065, China

Source title: Huozhayao Xuebao/Chinese Journal of Explosives and Propellants

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 1

Issue date: February 1, 2020

Publication year: 2020

Pages: 90-95

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: To study the damage effect and mechanism of the coated reactive material fragment impacting on the double-layer aluminum plates, a 14.5mm ballistic gun was applied for the penetration experiment of steel fragments and steel-coated reactive material fragments with the same mass and size on 3mm+3mm double-layer aluminum plates under different impact velocities. The ignition and damage mechanism of the reactive material fragment impacting double-layer aluminum plates was analyzed. The results indicate that at the impact velocity of 491-1391m/s, it has the same mechanism for the two kinds of fragments. Moreover, the perforation pattern presents circle and punch, and the hole diameter and its change with the impact velocity are also similar. With the impact velocity greater than 947m/s, the perforation diameter of the rear plate is significantly greater than that of the front plate. It is mainly because intense chemical reaction is released between the plates, the higher the impact velocity, the stronger the chemical reaction, and the significant the damage enhancement effect of the rear target. When the impact velocity is 947-1391m/s, the average perforation area of the rear target is 4.1 times the cross-sectional area of fragment, and the maximum section area is 7.2 times. The velocity of the reactive fragments impact ignition threshold in this case is 947m/s.

? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 17

Main heading: Aluminum coatings

Controlled terms: Aluminum - Aluminum coated steel - Aluminum plating - Ballistics - Behavioral research - Chemical reactions - Velocity

Uncontrolled terms: Cross sectional area - Damage mechanism - Enhancement effects - Impact ignition - Impact velocities - Perforation patterns - Reactive fragments - Reactive materials

Classification code: 404.1 Military Engineering - 541.1 Aluminum - 802.2 Chemical Reactions - 813.2 Coating Materials - 971 Social Sciences

Numerical data indexing: Size 1.45e-02m, Velocity 4.91e+02m/s to 1.39e+03m/s, Velocity 9.47e+02m/s to 1.39e+03m/s, Velocity 9.47e+02m/s

DOI: 10.14077/j.issn.1007-7812.201911013

Database: Compendex

Compilation and indexing terms, ? 2020 Elsevier Inc.

6.-------------------------------------------------

Accession number: 20201508382565

Title: Study on the Applicability of Vacuum Stability Criterion for Several New High Energy Density Compounds

Title of translation: 真空安定性判据对几种新型高能量密度化合物的适用性研究

Authors: Huang, Meng ; Ding, Li ; Chang, Hai ; Zhou, Jing ; He, Shao-Rong ; Zhang, Lin-Jun ; Zhu, Yan-Long ; An, Jing

Author affiliation:

Xi'an Modern Chemistry Research Institute, Xi'an; 710065, China

Corresponding author: Ding, Li (dingli403@sina.com)

Source title: Huozhayao Xuebao/Chinese Journal of Explosives and Propellants

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 1

Issue date: February 1, 2020

Publication year: 2020

Pages: 39-44

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: To determine the applicability of vacuum stability method to new high energy density compounds, the thermal decomposition processes of hexanitrohexaazaisowurtzitane(CL-20), ammonium dinitramide(ADN), 1, 3, 3-trinitroazetidine(TNAZ), 3, 4-dinitrofuranzan oxyfurazan(DNTF), RDX and nitroglycerin/ nitrocellulose(NC+NG) (mass ratio of 50:50) under constant temperature were investigated by NBK LAWA gasometric measuring system. The calculated total decomposition evolved gas are 653.53-662.38, 613.80-619.82, 624.04-636.223, 601.52-629.82, 594.52-617.25 and 556.74-569.22mL/g, respectively. The reaction depths of 2mL of vacuum stability criterion are all no more than 0.4%. The corresponding safety factors of all the samples are greater than 2.5. The decomposition mechanism functions and kinetic parameters of the typical traditional energetic materials and high energy density materials were analyzed. Through time-temperature equivalence relation, the decomposition time of high energy density materials to 2mL at 100 are 7341-8967, 2091-2808, 438-664 and 3955-3997h, respectively, which are much longer than the test time of 48h stipulated by vacuum stability method. The times for NC+NG (50:50) and RDX to 2mL at 100 are 5191-6316h and 111-241h. By contrast verification, it is proved that the 2mL criterion of vacuum stability method can be applied to these new high energy density compounds.

? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 14

Main heading: Vacuum applications

Controlled terms: Decomposition - Nitrates - Safety factor - Stability criteria

Uncontrolled terms: 1 ,3 ,3-trinitroazetidine - Ammonium dinitramide - Constant temperature - Decomposition mechanism - Hexanitrohexaazaisowurtzitane - High energy density materials - Thermal decomposition process - Time-temperature equivalence

Classification code: 633.1 Vacuum Applications - 802.2 Chemical Reactions - 804.2 Inorganic Compounds - 914.1 Accidents and Accident Prevention - 961 Systems Science

Numerical data indexing: Percentage 4.00e-01%, Specific_Volume 5.57e-01m3/kg to 5.69e-01m3/kg, Time 1.42e+07s to 1.44e+07s, Time 1.73e+05s, Time 1.87e+07s to 2.27e+07s, Time 4.00e+05s to 8.68e+05s, Volume 2.00e-06m3

DOI: 10.14077/j.issn.1007-7812.201901023

Database: Compendex

Compilation and indexing terms, ? 2020 Elsevier Inc.

7.-------------------------------------------------

Accession number: 20201508382547

Title: Study on the Safety of Reclaimed TNT by Solvent Extraction

Title of translation: 溶剂萃取法回收TNT的安全性研究

Authors: Guo, Xiu-Han ; Zhang, Shu-Hai ; Gou, Rui-Jun ; Chen, Ya-Hong

Author affiliation:

School of Environment and Safety Engineering, North University of China, Taiyuan; 030051, China

Corresponding author: Zhang, Shu-Hai (zsh93y@nuc.edu.cn)

Source title: Huozhayao Xuebao/Chinese Journal of Explosives and Propellants

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 1

Issue date: February 1, 2020

Publication year: 2020

Pages: 102-106

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: In order to make better use of the abandoned explosives, TNT component was recycled from B explosive by solvent extraction with toluene as solvent. The purity of reclaimed TNT was determined by liquid chromatography. The thermal stabilities of reclaimed TNT and contrast samples were analyzed by differential scanning calorimeter (DSC) and 5s explosion temperature experiment. Impact sensitivity and friction sensitivity of reclaimed TNT were measured. The results show that the purity of reclaimed TNT and contrast sample obtained by liquid chromatography are 94.19% and 96.66%, respectively. At different heating rates, the melting peak temperature of reclaimed TNT decreases by 0.9-1.4 compared with the contrast sample, the decomposition peak temperature decreases by about 5 , and the activation energy decreases by 3.51kJ/mol, indicating that the thermal stability of reclaimed TNT decreases. The test result of 5s explosion temperature is 422.7 , about 53 lower than the reference value of pure TNT, and 28.5 higher than the contrast sample. The change of the 5s explosion temperature is related to the type of impurities contained, and the impurities in reclaimed TNT have little effect on the thermal sensitivity. The impact sensitivity of reclaimed TNT is 8% and the friction sensitivity is 4%, both of which decrease compared with the contrast samples, indicating that the reclaimed TNT is safe and can meet the requirements of the reuse.

? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 17

Main heading: Explosives

Controlled terms: Activation energy - Differential scanning calorimetry - Friction - Liquid chromatography - Organic solvents - Reclamation - Solvent extraction - Thermodynamic stability

Uncontrolled terms: Differential scanning calorimeters - Explosion temperature - Friction sensitivities - Impact sensitivities - Impurities in - Peak temperatures - Reference values - Thermal sensitivity

Classification code: 641.1 Thermodynamics - 802.3 Chemical Operations - 803 Chemical Agents and Basic Industrial Chemicals - 944.6 Temperature Measurements

Numerical data indexing: Percentage 4.00e+00%, Percentage 8.00e+00%, Percentage 9.42e+01%, Percentage 9.67e+01%, Time 5.00e+00s

DOI: 10.14077/j.issn.1007-7812.201904019

Database: Compendex

Compilation and indexing terms, ? 2020 Elsevier Inc.

8.-------------------------------------------------

Accession number: 20201508382568

Title: Experimental Study on Shear-flow Ignition Performance of PBX Explosive

Title of translation: PBX 炸药剪切流动点火性能的实验研究

Authors: Chen, Peng ; Qu, Ke-Peng ; Li, Liang-Liang ; Xiao, Wei ; Chen, Rong ; Chang, Bo ; Yuan, Bao-Hui

Author affiliation:

Xi'an Modern Chemistry Research Institute, Xi'an; 710065, China

National University of Defense Technology, Changsha; 410073, China

Corresponding author: Yuan, Bao-Hui (ybhybh59@sina.com)

Source title: Huozhayao Xuebao/Chinese Journal of Explosives and Propellants

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 1

Issue date: February 1, 2020

Publication year: 2020

Pages: 69-73 and 80

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: In order to investigate the ignition performance of PBX explosives under full-constrained and shear-flow loading, the experimental projectile was tested by using a one-stage light gas gun. High-speed photography was used to record the reaction of the PBX explosive charges, and the stress curves in the loading process were measured by pressure sensor. A quarter of the model was used to simulate the full-constrained and shear-flow loading cases by using LS-DYNA software. The stress under full-constrained condition was used for the verification of the model parameters. Further, the model parameters verified was used to calculate the shear-flow loading case, and the flow velocity and other parameters of explosives under different conditions were obtained. The results show that the reaction of PBX explosives occurs more easily under shear-flow loading than the full constrained loading. Not only the shear flow rate but also the unit time flow rate have significant influence on the PBX explosives reaction. The rate of the shear-flow with 3mm diameter is 62% faster than that with 2mm diameter.

? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 15

Main heading: Shear flow

Controlled terms: Explosives - Flow velocity - High speed photography - Stress analysis

Uncontrolled terms: Constrained conditions - Light gas gun - Loading process - LS-DYNA - Model parameters - PBX explosive

Classification code: 631 Fluid Flow - 631.1 Fluid Flow, General - 742.1 Photography - 951 Materials Science

Numerical data indexing: Percentage 6.20e+01%, Size 2.00e-03m, Size 3.00e-03m

Database: Compendex

Compilation and indexing terms, ? 2020 Elsevier Inc.

9.-------------------------------------------------

Accession number: 20201508382526

Title: Treatment of Unsymmetrical Dimethylhydrazine Wastewater by Using Activated Carbon-Microwave-Fenton Technology

Title of translation: 活性炭-微波-Fenton联用技术处理偏二甲肼废水

Authors: Li, Hui ; Liu, Jun ; Zhuang, Jie ; Wang, Yan-Ping ; Huang, Xin-Yin ; Kong, Xiang-Shuai

Author affiliation:

Shanghai Institute of Space Propulsion, Shanghai; 201112, China

Shanghai Engineering Research Center of Space Engine, Shanghai; 201112, China

Source title: Huozhayao Xuebao/Chinese Journal of Explosives and Propellants

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 1

Issue date: February 1, 2020

Publication year: 2020

Pages: 96-101

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: To improve the treatment efficiency of unsymmetrical dimethylhydrazine (UDMH) wastewater, the activated carbon-microwave-Fenton technology was used and explored. The influence of H2O2 volume, microwave power, pH value, the molar ratios of Fe to H2O2, mass of activated carbon, etc. on wastewater treatment were investigated. The change of the main degradation intermediate products HCHO and CN were discussed. Under the optimum reaction conditions, the relationship between COD concentration and time was fitted linearly. The results indicate that the highest removal rate of COD and UDMH in the 100 mL wastewater with the initial mass concentration 400mg/L of UDMH are 98.0% and 99.3%, respectively, when the volume of H2O2 with 68.5 mg/L is 4.0mL, radiation power is 462W, the quality of activated carbon is 5.0g, pH value is adjusted to 3.5, and the molar ratio of Fe to H2O2 is 1:10. With the progress of the reaction, the concentration of the two main intermediate products including formaldehyde and cyanide due to the degradation of the UDMH reaches the highest peak at first, and then decreases rapidly, and finally they can be degraded completely. Linear fitting shows that the removal proportion rate of COD in wastewater follows the characteristics of first-order reaction kinetics. Reaction kinetics equation is as follows: ln(C0/C)=0.00355t+0.1755. The treatment of the UDMH wastewater by the activated carbon-microwave-Fenton technology can achieve ideal results after the reaction within 6min, indicating the characteristics of rapid reaction by using the technology. Therefore, the technology has the advantages of simple operation processes, low cost, no secondary pollution, simple device, small occupied area and high mineralization degree for organic matters, which is efficient for the treatment of the UDMH wastewater.

? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 17

Main heading: Activated carbon treatment

Controlled terms: Activated carbon - Association reactions - Iron compounds - Microwaves - Molar concentration - Molar ratio - Oxidation - pH - Reaction intermediates - Reaction kinetics - Steel beams and girders - Wastewater treatment

Uncontrolled terms: Degradation intermediates - First order reactions - Intermediate product - Optimum reaction conditions - Removal rate of cods - Secondary pollution - Treatment efficiency - Unsymmetrical dimethylhydrazine

Classification code: 408.2 Structural Members and Shapes - 452.4 Industrial Wastes Treatment and Disposal - 711 Electromagnetic Waves - 801.1 Chemistry, General - 802.2 Chemical Reactions - 804 Chemical Products Generally

Numerical data indexing: Mass 5.00e-03kg, Mass_Density 4.00e-01kg/m3, Mass_Density 6.85e-02kg/m3, Percentage 9.80e+01%, Percentage 9.93e+01%, Power 4.62e+02W, Time 3.60e+02s, Volume 1.00e-04m3, Volume 4.00e-06m3

DOI: 10.14077/j.issn.1007-7812.201904040

Database: Compendex

Compilation and indexing terms, ? 2020 Elsevier Inc.

10.------------------------------------------------

Accession number: 20201508382598

Title: Thermal Decomposition Characteristics and Kinetic Parameters of Tetraethylammonium Decahydrodecaborate

Title of translation: 十氢十硼酸双四乙基铵热分解特性及其动力学参数

Authors: Jiang, Fan ; Wang, Xiao-Feng ; Wang, Xiao-Hong ; Niu, Yu-Lei ; Liu, Hong-Ni ; Xue, Le-Xing ; Xue, Yun-Na

Author affiliation:

Xi'an Modern Chemistry Research Institute, Xi'an; 710065, China

Corresponding author: Wang, Xiao-Feng (wangxf_204@163.com)

Source title: Huozhayao Xuebao/Chinese Journal of Explosives and Propellants

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 1

Issue date: February 1, 2020

Publication year: 2020

Pages: 57-63

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: To explore the thermal decomposition characteristics and reaction kinetics of tetraethylammonium decahydrodecaborate (BHN-10), the intermediate and final products of the thermal decomposition process were analyzed by combined solid reaction cell in-situ and FTIR, TG-DSC-MS-FTIR simultaneous techniques. The kinetic parameters of the two decomposition stages were calculated by the Kissinger's and Ozawa's methods, and the reaction kinetic equations were obtained by Coats-Redfern method. The results show that the activation energies of the first and second stages of BHN-10 thermal decomposition are 150.9kJ/mol and 161.7kJ/mol, respectively. The first stage is controlled by the mechanism of random nucleation and nuclear growth, in which the most probable mechanism function is G( α )=[-ln(1- α )] (n=3). The second stage follows the Mampel power and the most probable mechanism function is G( α )= α . The mass loss in the first stage of the thermal decomposition reaction is 2.9%, which is consistent with the theoretical dehydrogenation mass loss. At this stage, the dehydrogenation of B10H10 produces amorphous form of boron and hydrogen. BHN-10 can produce a melt-decomposable intermediate product during the first decomposition process. The mass loss in the second stage is 39.4%, close to the calculated value of gas mass loss in the second stage 43.4%, which is proton transfer on a tetraethylammonium cation to form ethylene and Et3N through Hoffman elimination reaction, and Et3N is further decomposed into C2H6, NH3, H2 and carbon.

? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 26

Main heading: Reaction kinetics

Controlled terms: Activation energy - Ammonia - Ammonium compounds - Decomposition - Dehydrogenation - Ethylene - Integral equations - Kinetic parameters - Reaction intermediates - Thermolysis

Uncontrolled terms: Coats-Redfern method - Decomposition characteristics - Decomposition process - Elimination reaction - Intermediate product - Most probable mechanism functions - Thermal decomposition process - Thermal decomposition reaction

Classification code: 802.2 Chemical Reactions - 804 Chemical Products Generally - 921.2 Calculus - 931 Classical Physics; Quantum Theory; Relativity

Numerical data indexing: Percentage 2.90e+00%, Percentage 3.94e+01%, Percentage 4.34e+01%

DOI: 10.14077/j.issn.1007-7812.201903011

Database: Compendex

Compilation and indexing terms, ? 2020 Elsevier Inc.

11.------------------------------------------------

Accession number: 20201508382520

Title: Interior Ballistic Performance Prediction of Gun Propellant Charge Based on Closed-bomb Test

Title of translation: 基于密闭爆发器试验的发射装药内弹道性能预估

Authors: Zhao, Yu-Hua ; Xiao, Zheng-Gang ; Yan, Wen-Rong ; Yan, Guang-Hu ; Liang, Lei

Author affiliation:

Xi'an Modern Chemistry Research Institute, Xi'an; 710065, China

School of chemical Engineering, Nanjing University of Science and Technology, Nanjing; 210094, China

Source title: Huozhayao Xuebao/Chinese Journal of Explosives and Propellants

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 1

Issue date: February 1, 2020

Publication year: 2020

Pages: 81-84 and 89

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: To estimate the interior ballistic performance of gun propellant charge, a calculation method was established using static burning parameters obtained by the closed-bomb tests. The calculation of interior ballistic performance of charge was performed using 5/7 single-base camphor gun propellants from different batches, and the 30mm gun tests were carried out to evaluate the calculation accuracy. The results show that the calculated maximum chamber pressure by this method is 376.0MPa. Compared with mean value of tested maximum chamber pressure of 388.7MPa, the calculated error of the maximum chamber pressure is 3.27%. The calculated muzzle velocity is 1143.5m/s, with the calculation error of 1.11% compared with the tested velocity result of 1156.3m/s. The calculation method with high precision is effective on estimating the interior ballistic performance of propellants from different batches. It also provides a new method for assessment of propellant storage and service life. At last, it can serve as an economical and effective evaluation method in the delivery inspection.

? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 12

Main heading: Explosives

Controlled terms: Ballistics - Bombs (ordnance) - Propellants

Uncontrolled terms: Calculation accuracy - Calculation error - Chamber pressure - Closed bomb test - Gun propellants - High-precision - Interior ballistic - Muzzle velocity

Classification code: 404 Civil Defense and Military Engineering - 404.1 Military Engineering

Numerical data indexing: Percentage 1.11e+00%, Percentage 3.27e+00%, Pressure 3.76e+08Pa, Pressure 3.89e+08Pa, Size 3.00e-02m, Velocity 1.14e+03m/s, Velocity 1.16e+03m/s

DOI: 10.14077/j.issn.1007-7812.201901010

Database: Compendex

Compilation and indexing terms, ? 2020 Elsevier Inc.

12.------------------------------------------------

Accession number: 20201508382570

Title: Thermal Behavior and Safety of Dihydroxylammonium 3, 3'-dinitroamino-4, 4'-azoxyfurazanate

Title of translation: 3, 3'- 二硝氨基-4, 4'-氧化偶氮呋咱羟胺盐的热行为和热安全性研究

Authors: Xiao, Li-Bai ; Gao, Hong-Xu ; Zhao, Feng-Qi ; Ren, Xiao-Ning ; Qu, Wen-Gang ; Chen, Xue-Li ; Wang, Ying

Author affiliation:

Science and Technology on Combustion and Explosion Laboratory, Xi'an Modern Chemistry Research Institute, Xi'an; 710065, China

Corresponding author: Gao, Hong-Xu (gaohx204@163.com)

Source title: Huozhayao Xuebao/Chinese Journal of Explosives and Propellants

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 1

Issue date: February 1, 2020

Publication year: 2020

Pages: 24-27 and 32

Language: English

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: The thermal decomposition behaviors of dihydroxylammonium 3, 3'-dinitroamino-4, 4'-azoxyfurazanate(HNAF) were studied by using a C-500 type Calvet microcalorimeter at five different heating rates. The kinetic parameters of exothermic decomposition reaction were calculated by the Kissinger and Ozawa methods and then thermodynamic parameters were also determined. The specific heat capacity of dihydroxylammonium 3, 3'-dinitroamino- 4, 4'-azoxyfurazanate was measured with a Micro-DSC Ⅲ calorimeter.The results show that the apparent activation energy(E), pre-exponential constant(A), the entropy of activation( Δ S), the enthalpy of activation( Δ H) and the Gibbs free energy of activation( Δ G) are 205.26kJ/mol, 1020.32s, 140.76J/(mol ? K), 201.56kJ/mol and 200.39kJ/mol, respectively. The specific heat capacity equation and the molar specific heat capacity were determined as Cp=-1.560+0.016T-2.263 ×10T(J/(g ? K)) and 446.028J/(mol ? K), respectively. The self-accelerating decomposition temperature, adiabatic decomposition temperature rise, critical temperature of thermal explosion and adiabatic time-to-explosion are 444.44K, 2382.89K, 452.86K, 12.46s and 12.54s, respectively.

? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 27

Main heading: Specific heat

Controlled terms: Activation energy - Decomposition - Free energy - Gibbs free energy - Temperature

Uncontrolled terms: Adiabatic decomposition - Apparent activation energy - Exothermic decomposition - Free energy of activations - Preexponential constant - Self-accelerating decomposition temperatures - Thermal decomposition behavior - Thermodynamic parameter

Classification code: 641.1 Thermodynamics - 802.2 Chemical Reactions

Numerical data indexing: Temperature 2.38e+03K, Temperature 4.44e+02K, Temperature 4.53e+02K, Time 1.25e+01s

DOI: 10.14077/j.issn.1007-7812.201901016

Funding Details:

Number

Acronym

Sponsor

61426030303

-

-

21573173

NSFC

National Natural Science Foundation of China

Funding text: National Natural Science Foundation of China(No.21573173); Science and Technology on Combustion and Explosion Laboratory Advance Research Foundation(No.61426030303).

Database: Compendex

Compilation and indexing terms, ? 2020 Elsevier Inc.

13.------------------------------------------------

Accession number: 20201508382543

Title: Effect of Aluminum Content and Organic Fluoride on the Combustion Properties of Hydroxyl Terminated Polybutadiene Propellant

Title of translation: 铝含量和含氟有机化合物对丁羟推进剂燃烧性能的影响

Authors: Guo, Yan-Pei ; Li, Yong-Hui ; Li, Jian-Min ; Yang, Rong-Jie

Author affiliation:

School of Materials Science and Engineering, Beijing Institute of Technology, Beijing; 100081, China

Corresponding author: Yang, Rong-Jie (yrj@bit.edu.cn)

Source title: Huozhayao Xuebao/Chinese Journal of Explosives and Propellants

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 1

Issue date: February 1, 2020

Publication year: 2020

Pages: 74-80

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: In order to further increase the energy of HTPB propellant and inhibit the agglomeration of aluminum particles during combustion, hydroxyl terminated polybutadiene (HTPB) propellants with aluminum contents(mass fraction) of 16%-22% were prepared, and an organic fluoride (OF) was separately added as the aluminum burning accelerator. The effects of aluminum content and OF on the combustion properties of HTPB propellant were investigated. An oxygen bomb calorimeter was used to measure the heats of explosion of propellants in argon atmosphere (3MPa). The particle size distribution, elemental contents and phase compositions of the solid combustion products of propellants at 3MPa were achieved by using the laser particle size analyzer, X-ray photoelectron spectroscopy (XPS) and X-ray diffractometer (XRD), respectively. The burning rates of propellant were tested by a line scanning camera and a high pressure chamber measurement system. The high-speed photographic system was used to observe the agglomeration process of the melting aluminum particles on the burning surface. The results show that the HTPB propellant has the largest heat of explosion with an aluminum content of 20%. The introduction of OF reduces the heat of explosion slightly. With increasing the aluminum content in HTPB propellant, the agglomeration of molten aluminum particles on the burning surface becomes more serious, and both the particle sizes and residual aluminum contents of the solid combustion products increase gradually. On the other hand, the addition of OF can promote the formation of γ -Al2O3 and AlF3 and effectively inhibit the agglomeration of aluminum during combustion, thus greatly reducing the particle sizes and residual aluminum contents of combustion products. When the aluminum content is 20%, the addition of OF makes the active aluminum content of combustion product decrease by 50%. Besides, a lower aluminum content and the addition of OF are beneficial for enhancing the burning rate of HTPB propellant.

? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 17

Main heading: HTPB propellants

Controlled terms: Agglomeration - Alumina - Aluminum oxide - Aluminum powder metallurgy - Calorimeters - Combustion - Fluorine compounds - Particle size - Particle size analysis - Polybutadienes - Polyols - X ray photoelectron spectroscopy

Uncontrolled terms: Combustion products - Combustion property - High pressure chambers - Hydroxyl terminated polybutadienes - Laser particle size analyzer - Oxygen bomb calorimeters - Photographic systems - X ray diffractometers

Classification code: 536 Powder Metallurgy - 802.3 Chemical Operations - 804 Chemical Products Generally - 815.1.1 Organic Polymers - 944.5 Temperature Measuring Instruments - 951 Materials Science

Numerical data indexing: Percentage 1.60e+01% to 2.20e+01%, Percentage 2.00e+01%, Percentage 5.00e+01%, Pressure 3.00e+06Pa

DOI: 10.14077/j.issn.1007-7812.201908015

Database: Compendex

Compilation and indexing terms, ? 2020 Elsevier Inc.

14.------------------------------------------------

Accession number: 20201508382577

Title: Influence of Process Temperatures on the Coating Effect and Impact Sensitivity of F2604 /HMX Composite Particles

Title of translation: 工艺温度对F2604/HMX复合粒子包覆效果及撞击感度的影响

Authors: Wang, Xiao-Jia ; Guo, Wan-Xiao ; Li, Ya-Ning ; Yang, Ming-Fu ; Han, Zhi-Wei ; Wang, Bo-Liang

Author affiliation:

School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing; 210094, China

Corresponding author: Wang, Bo-Liang (boliangwang@163.com)

Source title: Huozhayao Xuebao/Chinese Journal of Explosives and Propellants

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 1

Issue date: February 1, 2020

Publication year: 2020

Pages: 45-50

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: To understand the influence of process temperatures on the performance of PBX explosives, fluororubber F2604 was coated on the surface of HMX with phase separation method to form F2604/HMX composite particles. The microstructure and element content of the composite particles were characterized by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The influence of fluororubber on coating effect of HMX at different process temperatures were conducted by means of molecular dynamics simulation. The impact sensitivity was measured by the characteristic drop height method. The results show that as the temperature increases, the N element content of the sample first decreases and then increases, and the coating degree first increases and then decreases. When the process temperature is 50 , the surface of the composite particles is smooth and regular. Meanwhile, the content of N element is the lowest and the coating degree is the highest(58.25%), which indicates that the coating effect is the best. The results of molecular dynamics simulation show that the binding energy of F2604/HMX is the highest at 50 (197.24J/mol). The interaction between fluororubber and HMX is the strongest, which means that the F2604/HMX system formed is the most stable. The characteristic drop height at 50 is the highest with the value of 81.7cm, which is 78.8% higher than that at 20 . The binding energy is the highest and the interaction between F2604 and HMX is the strongest at 50 . The stability of formed composite is improved, the coating and binding effects are enhanced, thereby, the impact sensitivity is reduced.

? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 21

Main heading: Complexation

Controlled terms: Binding energy - Coatings - Composite materials - Drops - Explosives - Molecular dynamics - Phase separation - Rope - Scanning electron microscopy - X ray photoelectron spectroscopy

Uncontrolled terms: Binding effects - Composite particles - Element contents - Impact sensitivities - Molecular dynamics simulations - Process temperature - Separation methods - Temperature increase

Classification code: 801.4 Physical Chemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 813.2 Coating Materials - 951 Materials Science

Numerical data indexing: Percentage 5.82e+01%, Percentage 7.88e+01%, Size 8.17e-01m

DOI: 10.14077/j.issn.1007-7812.201909006

Database: Compendex

Compilation and indexing terms, ? 2020 Elsevier Inc.

15.------------------------------------------------

Accession number: 20201508382596

Title: Synthesis, Crystal Structure and Properties of 5-(4-Azidofurazan-3-yl)-[1, 2, 3] triazolo[4, 5-c]furazan Inner Salt

Title of translation: 5-(4- 叠氮呋咱基)-[1, 2, 3]三唑[4, 5-c]并呋咱内盐的合成, 晶体结构及性能

Authors: Li, Ya-Nan ; Wang, Bin ; Zhang, Hong-Wu ; Chen, Tao ; Hu, Jian-Jian ; Chang, Pei

Author affiliation:

State Key Laboratory of Fluorine & Nitrogen Chemicals, Xi'an Modern Chemistry Research Institute, Xi'an; 710065, China

Source title: Huozhayao Xuebao/Chinese Journal of Explosives and Propellants

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 1

Issue date: February 1, 2020

Publication year: 2020

Pages: 28-32

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: A new hydrogen-free and nitrogen-rich energetic material, 5-(4-azidofurazan-3-yl)-[1, 2, 3]triazolo[4, 5-c]furazan inner salt, was synthesized via diazotization-azidation and oxidative-cyclization reactions using 3, 4-diaminofurazan as starting material. The structure of target compound was characterized by means of IR spectra, H NMR, C NMR, N NMR, N NMR and elemental analysis. The single crystal of AFTF was obtained and analyzed. The thermal stability of AFTF was studied by DSC method.The reaction mechanism of oxidative-cyclization was investigated. Based on the heats of formation calculated from CBS-QB3 method by Gaussian 09 program and the crystal density, the detonation parameters of AFTF were computed using EXPLO5 program. The results show that the crystal of AFTF belongs to a orthorhombic system and space group P2(1)2(1)2(1) with cell parameters: a= 8.1782(17) ? , b=8.6446(18) ? , c=11.521(2) ? , V=814.5(3) ? , Z=4, μ =0.151mm, F(000)=440. DSC analysis showes the melting point and thermal decomposition peak temperature of AFTF are 101.02 and 186.39 , respectively. The crystal density of AFTF is 1.795g/cm (296K), the content of nitrogen is 63.6%, the detonation velocity is 8.982km/s, the detonation pressure is 33.5GPa, the heat of formation is 1178.9kJ/mol and the detonation energy is 6450.8kJ/kg. As a hydrogen-free and nitrogen-rich high energy density compound with preferable detonation properties, AFTF can be applied to high energy propellants and gas generators, as well as the carrier of melt-cast explosives because of its low melting point.

? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 17

Main heading: Crystal structure

Controlled terms: Cyclization - Decomposition - Detonation - Gas generators - Melting point - Single crystals - Thermodynamic stability

Uncontrolled terms: Detonation parameter - Detonation properties - High energy densities - High energy propellant - Melt-cast explosives - Orthorhombic systems - Oxidative cyclization - Structure and properties

Classification code: 522 Gas Fuels - 641.1 Thermodynamics - 802.2 Chemical Reactions - 931.2 Physical Properties of Gases, Liquids and Solids - 933.1 Crystalline Solids - 933.1.1 Crystal Lattice

Numerical data indexing: Percentage 6.36e+01%, Pressure 3.35e+10Pa, Specific_Energy 6.45e+06J/kg, Temperature 2.96e+02K, Velocity 8.98e+03m/s

DOI: 10.14077/j.issn.1007-7812.201812002

Database: Compendex

Compilation and indexing terms, ? 2020 Elsevier Inc.

16.-------------------------------------------------

Accession number: 20201508382564

Title: Synthesis and Thermal Decomposition Properties of Pb-TKX-50 Combustion Catalyst

Title of translation: Pb-TKX-50 燃烧催化剂的合成及热分解性能

Authors: Cui, Zi-Xiang ; Gan, Jun-Zhen ; Fan, Jie ; Zhao, Feng-Qi ; Xue, Yong-Qiang ; Xiao, Li-Bai

Author affiliation:

Science and Technology on Combustion and Explosion Laboratory, Xi'an Modern Chemistry Research Institute, Xi'an; 710065, China

Department of Applied Chemistry, Taiyuan University of Technology, Taiyuan; 030024, China

Corresponding author: Zhao, Feng-Qi (zhaofqi@163.com)

Source title: Huozhayao Xuebao/Chinese Journal of Explosives and Propellants

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 1

Issue date: February 1, 2020

Publication year: 2020

Pages: 12-18

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: The combustion catalyst Pb-TKX-50 was synthesized by using dichloroethylene dioxime, dimethylformamide, sodium azide, hydroxylamine hydrochloride and lead nitrate as raw materials and the effects of Pb-TKX-50 on the mechanical sensitivities of propellants and its compatibilities with the main components of double-base (DB) propellants were evaluated. The thermal decomposition processes of Pb-TKX-50 at different heating rates were investigated by differential scanning calorimetry and thermogravimetry, and the apparent activation energies (EK and EO) and pre-exponential factors (AK) were calculated by Ozawa and Kissinger methods. In addition, the kinetic parameters of its thermal decomposition, including mechanism function, thermal explosion temperature and thermodynamic properties, were also obtained. The results show that, the addition of Pb-TKX-50, which possesses good compatibility with the main components of DB propellants, can decrease the impact sensitivity and friction sensitivity of propellant. The peak temperature of the main decomposition stage of Pb-TKX-50 is evidently higher than that of TKX-50, indicating its higher thermal stability. The apparent activation energies of Pb-TKX-50 calculated by the Ozawa and Kissinger methods are 181.45kJ/mol and 182.49kJ/mol, respectively, and the thermal decomposition process fits well with the Avrami-Erofeev equation. Furthermore, the self-accelerating decomposition temperature and the explosion critical temperature of Pb-TKX-50 are 500.53K and 544.33K, respectively. The free energy( Δ G), activation enthalpy( Δ H) and activation entropy ( Δ S) of Pb-TKX-50 decomposition are 158.87, 187.03 and 52.98 kJ/mol, respectively.

? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 23

Main heading: Lead compounds

Controlled terms: Activation energy - Amines - Catalyst supports - Combustion - Decomposition - Differential scanning calorimetry - Dimethylformamide - Free energy - Propellants - Sodium Azide - Temperature - Thermogravimetric analysis - Thermolysis

Uncontrolled terms: Apparent activation energy - Decomposition property - Friction sensitivities - Hydroxylamine hydrochloride - Mechanical sensitivity - Preexponential factor - Self-accelerating decomposition temperatures - Thermal decomposition process

Classification code: 641.1 Thermodynamics - 801 Chemistry - 802.2 Chemical Reactions - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.1 Organic Compounds - 944.6 Temperature Measurements

Numerical data indexing: Temperature 5.01e+02K, Temperature 5.44e+02K

DOI: 10.14077/j.issn.1007-7812.201904042

Database: Compendex

Compilation and indexing terms, ? 2020 Elsevier Inc.

17.------------------------------------------------

Accession number: 20201508382584

Title: Experimental Study on the Criterion of Impact Ignition of HTPB Propellant

Title of translation: HTPB 推进剂冲击发火判据的试验研究

Authors: Yang, Ming ; Huang, Wei-Dong ; Liu, Bing-Jie ; Li, Gao-Chun ; Li, Jin-Fei

Author affiliation:

Navy Submarine Academy, Qingdao; Shandong; 266000, China

Aerospace Engineering University, Beijing; 101400, China

Naval Aviation University, Yantai; Shandong; 264001, China

Source title: Huozhayao Xuebao/Chinese Journal of Explosives and Propellants

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 1

Issue date: February 1, 2020

Publication year: 2020

Pages: 85-89

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: In order to explore the criterion of impact ignition for a certain type of HTPB propellant, the drop hammer test was improved. The polyvinylidene fluoride(PVDF) piezoelectric film was introduced into the base to measure the stress peak of the propellant under the impact of the drop hammer, and the critical drop height and stress of 50% impact ignition were obtained. The height and stress information were compared with the impact ignition test based on the split Hopkinson pressure bar. The conditions affecting the critical impact ignition of the propellant under different impact stress loads were analyzed, and 50% impact ignition criterion of the certain type of propellant was concluded. The results show that the features of drop height and stress peak meet the relationship of σ =175.09H, the drop height of 50% is 75cm, and the maximum drop height of 100% no-ignition is 68cm. Under the impact conditions of 20, 30 and 40cm bullet, the stress peak of 50% impact ignition of propellant is 2760, 2410 and 2120MPa, respectively, and the effect lasts for 76, 100 and 130 μ s. The impact ignition of the propellant is directly related to the impact stress and the action time of the propellant. The impact ignition of the propellant can be judged by the criterion of στ =K, and the value of K is determined to be 574.6 MPa ? s.

? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 13

Main heading: HTPB propellants

Controlled terms: Drops - Fluorine compounds - Hammers - Mechanical testing - Rope

Uncontrolled terms: Drop hammers - Drop height - Impact ignition - Impact stress - Piezoelectric film - Polyvinylidene fluorides - Split Hopkinson pressure bars - Stress peaks

Classification code: 605.2 Small Tools, Unpowered - 804 Chemical Products Generally - 943.2 Mechanical Variables Measurements

Numerical data indexing: Percentage 5.00e+01%, Pressure 2.12e+09Pa, Pressure 2.41e+09Pa, Size 3.00e-01m, Size 4.00e-01m, Size 6.80e-01m, Size 7.50e-01m, Time 1.00e-04s, Time 1.30e-04s

DOI: 10.14077/j.issn.1007-7812.201812003

Database: Compendex

Compilation and indexing terms, ? 2020 Elsevier Inc.

18.------------------------------------------------

Accession number: 20201508382578

Title: Preparation and Characterization of LLM-105/CL-20 Based High Energy Insensitive PBX

Title of translation: LLM-105/CL-20 基高能钝感PBX的制备与性能表征

Authors: Zhang, Yuan-Ping ; Hou, Cong-Hua ; Tan, Ying-Xin ; Jia, Xin-Lei ; Li, Cong-Cong ; Wang, Jing-Yu

Author affiliation:

School of Environmental and Safety Engineering, North University of China, Taiyuan; 030051, China

Source title: Huozhayao Xuebao/Chinese Journal of Explosives and Propellants

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 1

Issue date: February 1, 2020

Publication year: 2020

Pages: 19-23 and 50

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: To meet the requirements for energetic materials with high energy and insensitivity, three types of LLM-105/CL-20 based PBXs with 10%, 20% and 30% mass fractions of LLM-105, respectively, were prepared via aqueous slurrying method by using CL-20 as the main explosive and LLM-105 as the insensitive agent. The morphology, crystal structure and thermal properties of the samples were characterized by scanning electron microscopy (SEM), powder X-ray diffraction (PXRD) and differential scanning calorimeter (DSC), and their mechanical sensitivities were was also tested. EXPLO5 software was used to calculate their detonation parameters. The results show that the LLM-105/CL-20 based PBX samples are spherical with compact particles, and the particle size is about 500 μ m. The crystal structure of each component in PBX is unchanged, and all three formulations show good thermal stability. With the LLM-105 content increasing, the critical temperature of thermal explosion of PBXs increases. Compared with CL-20, the characteristic drop heights of impact sensitivity of three LLM-105/CL-20 based PBXs increase by 25.88, 33.68, 37.18cm, respectively, and the probability of friction explosion decrease by 29%, 38% and 45%, respectively. The detonation performances of LLM-105/CL-20 based PBX explosives with three formulations are obviously higher than that of PBX-9501.

? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 19

Main heading: Crystal structure

Controlled terms: Detonation - Differential scanning calorimetry - Particle size - Scanning electron microscopy

Uncontrolled terms: Critical temperatures - Detonation parameter - Detonation performance - Differential scanning calorimeters - Impact sensitivities - Mechanical sensitivity - Powder X-ray diffraction (pXRD) - Structure and thermal properties

Classification code: 933.1.1 Crystal Lattice - 944.6 Temperature Measurements

Numerical data indexing: Percentage 1.00e+01%, Percentage 2.00e+01%, Percentage 2.90e+01%, Percentage 3.00e+01%, Percentage 3.80e+01%, Percentage 4.50e+01%, Size 3.72e-01m, Size 5.00e-04m

DOI: 10.14077/j.issn.1007-7812.201904006

Database: Compendex

Compilation and indexing terms, ? 2020 Elsevier Inc.


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