2020年第四期Ei收录情况
发布人:liux 发布时间:9/25/2020 5:14:39 PM  浏览次数:306次
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1. Synthesis and Characterization of Triblock PNIMMO-PCL-PNIMMO Energetic Binder

Accession number: 20203809185453

Title of translation: PNIMMO-PCL-PNIMMO

Authors: Wang, Xiao-Chuan (1, 2); Mo, Hong-Chang (2); Lu, Xian-Ming (2); Xu, Ming-Hui (2); Lu, Hong-Lin (2); Zhang, Qian (2); Liu, Ning (2)

Author affiliation: (1) School of Biomedical Sciences and Engineering, South China University of Technology, Guangzhou; 510006, China; (2) Xi’an Modern Chemistry Research Institute, Xi’an; 710065, China

Corresponding author: Lu, Xian-Ming(luxianming1220@126.com)

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

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 4

Issue date: August 1, 2020

Publication year: 2020

Pages: 378-382

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: Triblock PNIMMO-PCL-PNIMMO energetic binder was synthesized by ring opening polymerization of 3-nitratomethyl-3-methyloxetane (NIMMO). Polycaprolactone (PCL2000) and BF3?OEt2 were used as initiator and catalyst, respectively. The structure and properties of the energetic binder were studied by FT-IR, 1H NMR, 13C NMR, GPC, DSC and TGA. The results show that the triblock PNIMMO-PCL-PNIMMO copolymer has low viscosity (20, 6.8 Pa?s) and low glass transition temperature (-60), and its relative molecular mass is as expected. The temperature of exothermic peak is 216.5, indicating a good thermal stability. ? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 15

Main heading: Ring opening polymerization

Controlled terms: Glass transition

Uncontrolled terms: DSC and TGA - Energetic binder - Exothermic peaks - Low glass transition temperatures - Low viscosity - Relative molecular mass - Structure and properties - Synthesis and characterizations

Classification code: 802.3 Chemical Operations - 815.2 Polymerization

DOI: 10.14077/j.issn.1007-7812.201904038

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2020 Elsevier Inc.

Data Provider: Engineering Village

2. Study on the Influence Factors of Tracer Security Inspection of Granular ANFO Explosive Matrix

Accession number: 20203809185663

Title of translation:

Authors: Zhang, Guo-Liang (1, 2); Wang, Xu-Guang (3); Wang, Yin-Jun (3); Lu, Wan (4); Yang, Li-Feng (4)

Author affiliation: (1) School of Mechanics & Civil Engineering, China University of Mining & Technology, Beijing; 100083, China; (2) Public Order Administration Department of the Ministry of Public Security, Beijing; 100741, China; (3) BGRIMM Technology Group, Beijing; 100160, China; (4) Nayur Technologies (Beijing) Co., Ltd., Beijing; 100176, China

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

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 4

Issue date: August 1, 2020

Publication year: 2020

Pages: 451-456

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: In order to study the tracer security inspection technology of explosives, trace tracers were uniformly mixed with various industrial explosives as the matrix, and the energy spectrum detection method was used to detect the characteristic X-ray of tracer elements and a series of experiments were carried out on the influencing factors such as tracer content, explosive mass, medium material and detection distance. The test results based on granular ANFO explosive show that while the tracer content increases from 0.01% to 0.1%, the detection distance of 50g ANFO explosive in air increases from 40mm to 180mm. In addition, with the tracer content of 0.05%, the maximum detection distance in air increases from 40mm to 180mm when the mass of ANFO explosive increases from 10g to 100g. Herein, the maximum detection distances of 50g granular ANFO explosives in air, cloth, paper, wood and foam media are 120, 80, 35, 70, 90mm respectively. However, when copper, iron and aluminum with thickness of 0.4mm, 0.6mm and 6mm are used as medium materials, the maximum detection distances are 40mm, 1mm and 10mm respectively. When the detection distance is 0, the ANFO with tracer content of 0.05% and mass of more than 4g can be detected accurately. Therefore, it is not only technically feasible but also highly accurate to detect the characteristic X-ray of tracer elements for the security inspection of explosives. The results show that the maximum detection distance increases linearly with the tracer content and explosive mass, and is negatively related with the density of the medium material. ? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 15

Main heading: Explosives detection

Controlled terms: Explosives - Inspection - Trace elements - Tracers - X rays

Uncontrolled terms: Characteristic x rays - Energy spectra - Highly accurate - Industrial explosive - Inspection technology - Medium material - Tracer element

Classification code: 801 Chemistry - 932.1 High Energy Physics

Numerical data indexing: Mass 1.00e-02kg to 1.00e-01kg, Mass 4.00e-03kg, Mass 5.00e-02kg, Percentage 1.00e-02% to 1.00e-01%, Percentage 5.00e-02%, Size 1.00e-02m, Size 1.00e-03m, Size 4.00e-02m to 1.80e-01m, Size 4.00e-02m, Size 4.00e-04m, Size 6.00e-03m, Size 6.00e-04m, Size 9.00e-02m

DOI: 10.14077/j.issn.1007-7812.202003001

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2020 Elsevier Inc.

Data Provider: Engineering Village

3. Research Progress on Reducing Erosivity of Gun Barrel

Accession number: 20203809185583

Title of translation:

Authors: Wei, Ding (1); Wang, Qiong-Lin (1); Yan, Wen-Rong (1); Zhang, Jiang-Bo (1); Zhao, Yu-Hua (1); Liu, Yi (1)

Author affiliation: (1) Xi’an Modern Chemistry Research Institute, Xi’an; 710065, China

Corresponding author: Wang, Qiong-Lin(wangqionglin359@126.com)

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

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 4

Issue date: August 1, 2020

Publication year: 2020

Pages: 351-361

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: Aiming at the request of reducing erosivity of gun barrel, the generation process and mechanism, test methods and the main influence factors of gun barrel erosion were analyzed. The latest research progress on the reducing erosivity of gun barrel was introduced, including thermal factor control, chemical factor control and mechanical factor control. The inhibitive mechanism of erosion reducing additives was discussed. The research and application of erosion reducing additives was discussed with emphasis, including internal and external erosion reducing additives of gun propellant. The key development directions of the reducing erosivity of gun barrel will be simplified erosion test methods, new high-energy and low-erosivity gun propellant and charge structure, strengthening treatment of severely worn parts and multi-functional erosion reducing additives. 82 references are attached. ? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 82

Main heading: Additives

Controlled terms: Erosion - Propellants - Testing

Uncontrolled terms: Chemical factors - Development directions - Erosion test methods - Generation process - Mechanical factors - Multi-functional - Research and application - Strengthening treatments

Classification code: 803 Chemical Agents and Basic Industrial Chemicals

DOI: 10.14077/j.issn.1007-7812.201904033

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2020 Elsevier Inc.

Data Provider: Engineering Village

4. Application of Spheroidal Ultrafine AP in AP-CMDB Propellant

Accession number: 20203809185565

Title of translation: APAP-CMDB

Authors: Zhang, Zheng-Zhong (1); Yu, Hong-Jian (1); Guo, Xiao-De (2); Li, Duo (3); Deng, Chong-Qing (1); Lei, Hong-Bing (3); Zhu, Jie (1); Chen, Yi-Bin (1)

Author affiliation: (1) Xi’an Modern Chemistry Research Institute, Xi’an; 710065, China; (2) National Special Powder Engineering Research Center, Nanjing University of Science and Technology, Nanjing; 210094, China; (3) Shanxi North Xing’an Chemical Industry Co. Ltd., Taiyuan; 030008, China

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

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 4

Issue date: August 1, 2020

Publication year: 2020

Pages: 424-427

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: To reduce the mechanical sensitivity of AP-CMDB propellant with ultrafine AP, the spheroidal ultrafine AP was added into CMDB propellant. The microstructure of the propellants were obtained by scanning electronic microscope. The effects of spheroidal ultrafine AP on the densities, mechanical properties, combustion performance and mechanical sensitivities of the propellant were investigated. The results show that the surface of spheroidal ultrafine AP is more smooth and it has a better dispersion uniformity in the propellant. However, there are interface debonding between spheroidal ultrafine AP and double base matrix. The density is not changed while the burning rate of AP-CMDB propellant with spheroidal ultrafine AP at 10MPa is increased from 60.12mm/s to 63.03mm/s. The mechanical sensitivities of AP-CMDB propellants with spheroidal ultrafine AP are reduced greatly. The characteristic drop height H50 is increased by 15.7cm and the friction sensitivity P is reduced by 32%. However, the impact strength of the propellant is reduced from 5.22kJ/m2 to 4.12 kJ/m2 at -40.The reasons maybe attributed to the thermal decomposition, microstructure, dispersion uniformity of spheroidal ultrafine AP, and the interface bonding between AP and double base matrix. ? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 15

Main heading: Propellants

Controlled terms: Decomposition - Dispersions - Impact strength - Microstructure

Uncontrolled terms: Burning rate - CMDB propellant - Combustion performance - Friction sensitivities - Interface bonding - Interface debonding - Mechanical sensitivity - Scanning electronic microscopes

Classification code: 802.2 Chemical Reactions - 951 Materials Science

Numerical data indexing: Percentage 3.20e+01%, Pressure 1.00e+07Pa, Size 1.57e-01m, Velocity 6.01e-02m/s to 6.30e-02m/s

DOI: 10.14077/j.issn.1007-7812.201901031

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2020 Elsevier Inc.

Data Provider: Engineering Village

5. 3D Printing Method of Gun Propellants Based on Vat Photopolymerization

Accession number: 20203809185553

Title of translation: 3D

Authors: Hu, Rui (1); Yang, Wei-Tao (1); Jiang, Zai-Xing (2); Yu, Xian-Feng (3); Wang, Qiong-Lin (1)

Author affiliation: (1) Xi’an Modern Chemistry Research Institute, Xi’an; 710065, China; (2) College of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin; 150001, China; (3) Unit 63961 of PLA, Beijing; 100012, China

Corresponding author: Yang, Wei-Tao(njyangweitao@163.com)

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

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 4

Issue date: August 1, 2020

Publication year: 2020

Pages: 368-371 and 382

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: Due to the limitation of traditional manufacturing technologies for manuscript complex gun propellants, 3D vat photopolymerization technology was used to print gun propellant composed of hexogen(RDX) and photosensitive resin binder. Rotational viscometer, infrared thermal imager and universal material testing machine were used to test the viscosity, light curing exothermic reaction, mechanical properties of printed propellant. The rotational viscometer test results show that the 3D light curing polymerization printing technology is feasible. The photosensitive resin viscosity can be reduced from 42 to 1.5Pa?s by adding the diluent. Meanwhile, the viscosity can be reduced to a minimum at a very small shear rate. Infrared thermal imager results show that the curing process of photopolymerization is exothermic, and the highest curing temperature is 51.1, which satisfied the safety requirements of energy materials such as RDX. The mechanical properties results show that the tensile strength, compressive strength and bending strength of the 3D printed propellant are 6.46, 36.1 and 10.2MPa, respectively. The mechanical strength at room temperature is comparable to that of conventional gun propellant. The results indicate that the 3D printing method based on vat photopolymerization is feasible. ? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 13

Main heading: 3D printers

Controlled terms: Bending strength - Compressive strength - Curing - Light sensitive materials - Photopolymerization - Photosensitivity - Resins - Solid propellants - Tensile strength - Viscometers - Viscosity - Viscosity measurement

Uncontrolled terms: Curing temperature - Infrared thermal imager - Material testing - Photosensitive resins - Printing technologies - Rotational viscometer - Safety requirements - Traditional manufacturing

Classification code: 524 Solid Fuels - 631.1 Fluid Flow, General - 741.1 Light/Optics - 745.1.1 Printing Equipment - 802.2 Chemical Reactions - 804 Chemical Products Generally - 815.1.1 Organic Polymers - 943.3 Special Purpose Instruments

Numerical data indexing: Pressure 1.02e+07Pa, Pressure 3.61e+07Pa

DOI: 10.14077/j.issn.1007-7812.201909033

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2020 Elsevier Inc.

Data Provider: Engineering Village

6. Energy Conversion Characteristics of Resonance Acoustic Mixer Used for 100g Level Manufacture of Propellants and Explosives

Accession number: 20203809185472

Title of translation:

Authors: Chen, Song (1); Ma, Ning (1); Xie, Zhong-Yuan (1); Qin, Neng (1); Zhang, Zhe (1); Sun, Xiao-Peng (1); Wang, Xiao-Feng (1)

Author affiliation: (1) Xi’an Modern Chemistry Research Institute, Xi’an; 710065, China

Corresponding author: Ma, Ning(marknumberl@sina.com)

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

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 4

Issue date: August 1, 2020

Publication year: 2020

Pages: 383-387

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: In order to determine the conversion characteristics between input energy of drive motors and the mixing kinetic energy of the resonance acoustic mixer (RAM) under different acceleration conditions, and master the basic rules of equipment amplification, technology amplification and technology control, the relationship between input energy of driving motor and acceleration was tested. Taking Comp.B, cast PBX explosive, melt-cast PBX explosive and HTPE propellant with their mass of 200 gram as mixed objects and the acceleration was changed repeatedly in the range of 0-60g. The results show that there is a linear relationship between the input energy and mixing acceleration, and the input energy increases with the increase of mixing acceleration. The linear relationship is not affected by the repeated start-stop of the equipment and frequent adjustment of acceleration. Therefore, the acoustic resonance equipment has good operation stability and repeatability. In addition, the change of material state in the mixing process, the demping change caused by the change of material state, and the demping change caused by the vacuum have little effect on the linear relationship between input energy and acceleration. However, the linear relationship between the input energy and acceleration is sensitive to the change of the mass of the mixed material, and the input energy increases with the increase of the mass of the mixed material under the same acceleration condition. For the equipment used in this paper, when the mass of mixed material is 200 gram, the slope of the linear relationship is 0.339. This study can provide some guidance for the performance parameter calibration and process control of resonance acoustic mixer. ? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 9

Main heading: Explosives

Controlled terms: Acceleration - Energy conversion - Kinetic energy - Kinetics - Mixers (machinery) - Mixing - Process control - Propellants - Resonance

Uncontrolled terms: Acceleration condition - Acoustic resonance - Conversion characteristics - Linear relationships - Mixed materials - Mixing kinetics - Operation stability - Performance parameters

Classification code: 525.5 Energy Conversion Issues - 802.3 Chemical Operations - 931 Classical Physics; Quantum Theory; Relativity - 931.1 Mechanics

Numerical data indexing: Mass 0.00e+00kg to 6.00e-02kg, Mass 1.00e-01kg, Mass 2.00e-01kg

DOI: 10.14077/j.issn.1007-7812.201907026

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2020 Elsevier Inc.

Data Provider: Engineering Village

7. Synthesis and Characterization of GAP-PTMEG-GAP Triblock Copolyether

Accession number: 20203809185475

Title of translation: GAP-PTMEG-GAP

Authors: Mo, Hong-Chang (1); Xu, Ming-Hui (1); Liu, Ning (1); Lu, Xian-Ming (1); Liu, Meng (1); Wang, Wei (1)

Author affiliation: (1) Xi’an Modern Chemistry Research Institute, Xi’an; 710065, China

Corresponding author: Lu, Xian-Ming(luxianming1220@126.com)

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

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 4

Issue date: August 1, 2020

Publication year: 2020

Pages: 388-391 and 398

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: In order to develop new energetic binders,triblock copolyether PECH-PTMEG-PECH was synthesized by the cationic ring-opening polymerization of epichlorohydrin,using polytetrahydrofunan ether glycol(PTMEG)as macroinitiator, boron-trifuoride ethylether complex(BF3?OEt2)as the catalyst, then GAP-PTMEG-GAP was prepared by the azidation of PECH-PTMEG-PECH.The copolyether was characterized by IR,1H NMR,13C NMR,GPC and DSC. The results show that the enchained ratio of PTMEG and PECH in the copolyethers is same with the calculated feed ratio, the relative molecular mass is controllable and relative molecular mass distribution is relatively narrow, the time of azidation is 28h, the glass transition temperature of copolyether is-58.6, the viscosity of copolyether is 3.5Pa?s, the decomposition peak temperature of copolyether is 256.6, the mechanical properties of polytriazole film cured by bis-propargyl-succinate(BPS)are 1.04MPa for tensile strength and 73% for elongation at break at room temperature, and its mechanical properties are better than GAP based polytriazole elastomer. ? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 10

Main heading: Ring opening polymerization

Controlled terms: Binders - Cationic polymerization - Ethers - Glass transition - Molecular mass - Tensile strength

Uncontrolled terms: Cationic ring opening polymerization - Elongation at break - Energetic binder - Epichlorohydrin - Macroinitiators - Peak temperatures - Relative molecular mass - Synthesis and characterizations

Classification code: 801 Chemistry - 802.3 Chemical Operations - 803 Chemical Agents and Basic Industrial Chemicals - 804.1 Organic Compounds - 815.2 Polymerization

Numerical data indexing: Percentage 7.30e+01%, Pressure 1.04e+06Pa, Time 1.01e+05s

DOI: 10.14077/j.issn.1007-7812.201811021

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2020 Elsevier Inc.

Data Provider: Engineering Village

8. Experimental Study on Thermal Damage Characterization of HMX Based PBX after High-temperature Treatment

Accession number: 20203809185465

Title of translation: HMXPBX

Authors: Shao, Zhu-Ge (1); Liu, Ru-Qin (1); Wu, Yan-Qing (1); Huang, Feng-Lei (1)

Author affiliation: (1) State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing; 100081, China

Corresponding author: Wu, Yan-Qing(wuyqing@bit.edu.cn)

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

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 4

Issue date: August 1, 2020

Publication year: 2020

Pages: 406-412

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: To study the thermal damage behavior of cyclotetramethylenete-tranitramine (HMX) based polymer bonded explosive (PBX) undergoing high-intensity thermal insult (room temperature to 200, 10h), micron-scale computed tomography (micro-CT) was used to quantitatively characterize the changes of the micron-scale porosity of HMX based PBX before and after heating. Combined with the changes of sample size, mass, true density and micro-morphology, the thermal damage of HMX based PBX was analyzed.The results show that the sample volume, mass and true density do not change obviously at 160. The volume expansion of the sample is observed to be irreversible after treatment at 180, and the true density decreases by 8.75%. However, the mass does not change. After treatment at 200, the true density reduces up to 9.92% due to the decrease of mass, volume expansion, thermo-induced porosity and cracks on the surface of samples. According to the microscopic observation and statistical calculation, the porosity of the sample increases first and then decreases with the increase of the test temperature. The maximum porosity is 7.81% at 180 and then decreases at 200. Herein, it is considered that a large number of cracks and debonding between HMX grains caused by phase transformation at 180, which makes the porosity of PBX increase. Then the refinement of the grains fills a part of the voids resulting in a recovery of porosity at 200. However, the change of porosity is not affected by binder since no melting occured. ? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 20

Main heading: Explosives

Controlled terms: Computerized tomography - Expansion - Morphology - Porosity

Uncontrolled terms: After high temperature - After-treatment - Micromorphologies - Microscopic observations - Polymer bonded explosives - Statistical calculations - Test temperatures - Volume expansion

Classification code: 723.5 Computer Applications - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science

Numerical data indexing: Percentage 7.81e+00%, Percentage 8.75e+00%, Percentage 9.92e+00%, Time 3.60e+04s

DOI: 10.14077/j.issn.1007-7812.201912025

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2020 Elsevier Inc.

Data Provider: Engineering Village

9. Rapid Detection Method for the Total Volatile Content in Drying Process of Triple-based Gun Propellant

Accession number: 20203809185577

Title of translation:

Authors: Wang, Yun-Yun (1); Deng, Guo-Dong (1); Zhang, Gao-Feng (1); Zhang, Zhi-Fang (2); Cui, Li-Ming (2); Li, Xin-Xin (2); Wang, Xu-Dong (2)

Author affiliation: (1) National Special Superfine Powder Engineering Research Center of China, NUST, Nanjing; 210094, China; (2) Liaoning Qingyang Chemistry Industry Corporation, Liaoyang; Liaoning; 111000, China

Corresponding author: Deng, Guo-Dong(13505196092@163.com)

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

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 4

Issue date: August 1, 2020

Publication year: 2020

Pages: 419-423 and 427

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: The total volatile (alcohol and ketone) content of triple-based gun propellant during drying process was quickly determined by near-infrared spectroscopy. By comparing the spectral characteristics of triple-based gun propellant sample and the total volatile, the optimal modeling spectrum of the total volatile was determined. The optimum spectral pretreatment method was finally confirmed, depending on the effect of spectra pretreating methods of triple-based gun propellant. The calibration model of triple-based gun propellant was established by partial least squares method (PLS), and the optimal principal factor of the total volatile model was chosen as 8, and the prediction ability of the model was demonstrated. The results show that the optimal spectral range is 5700-6100cm-1, and the best spectral pretreating method is the combination of first order derivative and SNV.The determination coefficient of the calibration(RC2) is 0.9703, the root mean square error of calibration (RMSEC) is 0.1497; the determination coefficient of prediction (RP2) is 0.9628, and the root mean square error of prediction (RMSEP) is 0.1879. The ratio of the standard deviation of the validation set to standard error of prediction (RPD) of the total volatile model is 6.7. The model is applied to the detection of the total volatile content in the drying process of triple-based gun propellant, the average deviation of the predicted value is 0.025%. This method exhibited good predictive performance and repeatability, which can realize the accurate detection of the total volatile content during the drying process of triple-based gun propellant in 60s. ? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 20

Main heading: Least squares approximations

Controlled terms: Errors - Forecasting - Infrared devices - Infrared drying - Ketones - Mean square error - Near infrared spectroscopy - Propellants

Uncontrolled terms: Determination coefficients - First order derivatives - Partial least-squares method - Root mean square error of calibrations - Root-mean-square error of predictions - Spectral characteristics - Spectral pre treatments - Standard error of prediction

Classification code: 804.1 Organic Compounds - 921.6 Numerical Methods - 922.2 Mathematical Statistics

Numerical data indexing: Percentage 2.50e-02%

DOI: 10.14077/j.issn.1007-7812.201908008

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2020 Elsevier Inc.

Data Provider: Engineering Village

10. Catalytic Decomposition Kinetics of HMX in Solid Phase with Two Nano Metal Powders

Accession number: 20203809185483

Title of translation: HMX

Authors: Liu, Wen-Liang (1); Gu, Yan (1); Yu, Si-Long (1); Zhang, Lin-Jun (1)

Author affiliation: (1) 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: 4

Issue date: August 1, 2020

Publication year: 2020

Pages: 413-418

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: In order to obtain the catalytic effect of nano metal powder on the thermal decomposition of HMX and the influence law of decomposition kinetics, the effects of nano metal powders (Ti, Zr) and normal metal powders (Ti, Zr) on the thermal decomposition of HMX were investigated by using Differential Scanning Caborimetry(DSC)and Thermal Gravimetry (TG). The isothermal kinetic parameters of the mixture were obtained by iso-TG tests. The results show that the decomposition of HMX in condensed phase is accelerated apparently by the nano powders. When the mass ratio of HMX and metal powder is 2:1, the initial decomposition temperatures of HMX in condensed phase decrease by 3.9 and 3.0 due to nano Ti and nano Zr, respectively. The condensed phase decomposition ratios of HMX increase from 0.5% to 18.3% or 4.6% in the above-mentioned systems. The condensed phase decomposition ratio increases with the increase of the nano metal powders mass ratios. The initial decomposition reactions of HMX with metal powders follow random nucleation and growth Avrami-Erofeyev equation. The apparent activation energy and preexponential factor of the decomposition of HMX in condensed phase is decreased by nano Ti apparently, and the catalytic decomposition coefficient described by the reaction rate constant ratio is also increased. The apparent activation energy (Ea) and preexponential factor (lnA/s-1) of HMX/ nano Ti (mass ratio 2:1) are 138.9kJ/mol and 25.47, respectively. In addition, It is also found that the kinetic parameters of HMX/metal powders mixtures, HMX/metal oxides powders mixtures and HMX in various phase states have the same “kinetic compensation effect”. ? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 9

Main heading: Powder metals

Controlled terms: Activation energy - Decomposition - Kinetic parameters - Metals - Mixtures - Rate constants - Thermolysis

Uncontrolled terms: Apparent activation energy - Catalytic decomposition - Decomposition kinetics - Decomposition reaction - Initial decomposition temperatures - Isothermal kinetics - Kinetic compensation effect - Preexponential factor

Classification code: 802.2 Chemical Reactions - 931 Classical Physics; Quantum Theory; Relativity

Numerical data indexing: Percentage 4.60e+00%, Percentage 5.00e-01% to 1.83e+01%

DOI: 10.14077/j.issn.1007-7812.201907021

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2020 Elsevier Inc.

Data Provider: Engineering Village

11. Effect of Potassium 5,5’-Azotetrazolate on Phase Transformation and Thermal Decomposition of Ammonium Nitrate

Accession number: 20203809185521

Title of translation: 5,5’-

Authors: Wang, Yi (1); Song, Xiao-Lan (2); Li, Feng-Sheng (3)

Author affiliation: (1) School of Materials Science and Engineering, North University of China, Taiyuan; 030051, China; (2) School of Environment and Safety Engineering, North University of China, Taiyuan; 030051, China; (3) 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: 4

Issue date: August 1, 2020

Publication year: 2020

Pages: 392-398

Language: English

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: Potassium 5,5’-azotetrazolate (raw PZT) was synthesized using 5-amino-1H-tetrazol (5-ATZ) as the precursor. By dissolving raw PZT and ammonium nitrate (AN) in water, evaporating the water off, and then “AN+PZT” composites were prepared. IR and XRD analyses were employed to characterize raw PZT and “AN+PZT” composites. Thermal analyses were performed to probe the effect of raw PZT on phase transition and thermolysis of AN. The molecular structure of raw PZT was confirmed by IR spectrum, and results demonstrate that raw PZT is a kind of hydrate. XRD patterns of “AN+PZT” composites reveal that some eutectics generate during the preparation. DSC curves of “AN+PZT” composites disclose that the phase transformation of AN at ambient temperature is entirely inhibited by doping with raw PZT. Peak temperature for decomposition of AN also decrease obviously by doping with raw PZT. The final decomposition products of “0.8AN+0.2PZT” composite are N2O, HNO3 and H2O. By compared “0.8AN+0.2PZT”composite with pure AN, it is found that HNO3 disappear, while NH3 is detected as an intermediate product. It may be because that PZT react with HNO3 firstly after decomposition of AN, and NH3 is oxided by HNO3 at a higher temperature. This promotes thermal decomposition of AN in mechanism since the consumption of HNO3 dominates its thermolysis. ? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 17

Main heading: Thermolysis

Controlled terms: Ammonia - Decomposition - Nitrates - Phase transitions - Potassium - Thermoanalysis - X ray diffraction

Uncontrolled terms: Ammonium nitrate - Decomposition products - HnO3 and H2O - Intermediate product - IR spectrum - Peak temperatures - XRD analysis - XRD patterns

Classification code: 549.1 Alkali Metals - 801 Chemistry - 801.4 Physical Chemistry - 802.2 Chemical Reactions - 804.2 Inorganic Compounds

DOI: 10.14077/j.issn.1007-7812.201901035

Funding Details: Number: 6140656020201, Acronym: -, Sponsor: -;

Funding text: Weapons and Equipments Pre-research Fund (No. 6140656020201).

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2020 Elsevier Inc.

Data Provider: Engineering Village

12. Massive Preparation and Characterization of Superfine PETN by Mechanical Ball Milling Method

Accession number: 20203809185481

Title of translation:

Authors: Guo, Shuang-Feng (1); Dong, Jun (1, 2); Hao, Ga-Zi (3); Liu, Qiao-E (4); Gao, Xiang-Dong (4)

Author affiliation: (1) Xi’an Modern Chemistry Research Institute, Xi’an; 710065, China; (2) Naval University of Engineering, Wuhan; 430033, China; (3) National Special Superfine Powder Engineer Research Center, Nanjing University of Science and Technology, Nanjing; 210094, China; (4) Research Institute of Gansu Yinguang Chemical Industry Group Co., Ltd, Baiyin; Gansu; 730900, China

Corresponding author: Dong, Jun(94180853@qq.com)

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

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 4

Issue date: August 1, 2020

Publication year: 2020

Pages: 399-405

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: In order to achieve massive and green preparation of superfine pentaerythritol tetranitrate (PETN), mechanical ball-milling method and vacuum freeze drying technique were applied and superfine PETN powders with good dispersity and controllable particle sizes between 1-20μm were successfully prepared. At the same time, another kind of superfine PETN particles were produced through solvent/non-solvent recrystallization method as a comparison. The morphology and structure of the two kinds of superfine PETN samples were characterized by SEM, XRD and FTIR. The thermal decomposition characteristics were analyzed by a TG-DSC simultaneous thermal analyzer, and the impact sensitivity and friction sensitivity were tested. The results showed that the particle size of superfine PETN with greatly reduced edges prepared by mechanical ballmilling method was about 1μm, and some of the particles were spherical, while the average particle size of superfine PETN with flake-like structure prepared by recrystallization was about 11.4μm. Besides, the crystal and molecular structures of both two kinds of superfine PETN had no change compared with raw PETN. The thermal decomposition temperatures of superfine PETN prepared by two kinds of methods were shifted to lower temperatures. The activation energies were decreased from 104.1kJ/mol to 71.9kJ/mol and 77.1kJ/mol, respectively, and the critical temperatures of thermal explosion were reduced from 175.0 to 138.1 and 149.1, respectively, indicating that the thermal stabilities were decreased. The mechanical sensitivity tests revealed that the impact sensitivity of superfine PETN prepared by mechanical ball-milling method had a decrease of 24.8% and friction sensitivity had a decrease of 17.6%. While the impact sensitivity of superfine PETN prepared by recrystallization had an increase of 29.7% and friction sensitivity had a decrease of 47.1%. The massive, low-cost and green preparation of superfine PETN with controllable particle sizes can be realized by mechanical ballmilling method. ? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 14

Main heading: Ball milling

Controlled terms: Activation energy - Decomposition - Friction - Milling (machining) - Particle size - Recrystallization (metallurgy) - Thermoanalysis - Thermolysis

Uncontrolled terms: Crystal and molecular structure - Decomposition characteristics - Friction sensitivities - Mechanical ball milling - Mechanical sensitivity - Morphology and structures - Pentaerythritol tetranitrate - Thermal decomposition temperature

Classification code: 531.1 Metallurgy - 604.2 Machining Operations - 801 Chemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations

Numerical data indexing: Percentage 1.76e+01%, Percentage 2.48e+01%, Percentage 2.97e+01%, Percentage 4.71e+01%, Size 1.00e-06m, Size 1.00e-06m to 2.00e-05m, Size 1.14e-05m

DOI: 10.14077/j.issn.1007-7812.201903004

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2020 Elsevier Inc.

Data Provider: Engineering Village

13. Evaluation of Safe Storage Life of Nitrate Propellant with Microcalorimetry

Accession number: 20203809185639

Title of translation:

Authors: Zhou, Jing (1); Ding, Li (1); Zhu, Yan-Long (1); An, Jing (1); Huang, Meng (1)

Author affiliation: (1) 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: 4

Issue date: August 1, 2020

Publication year: 2020

Pages: 437-441

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: The extrapolation equation of NATO STANAG 4582 standard is improved by taking the limit heat flow value as the criterion of safe storage life and using the “temperature coefficient” equation as the “time-temperature equivalence” relationship. Then a new method of “single temperature timing heat flow thermal method” for fast predicting the safe storage life of nitrate propellant by microcalorimetry is established. That is to say, at a single temperature, only a short period of test is needed to predict the safe storage life of nitrate propellant at a specific storage temperature for a specific period of time, or to evaluate the thermal stability of nitrate propellant during a predetermined storage period. The test results show that this method is widely applicable to the evaluation of nitrate propellants such as single-based propellant, double-based propellant, triple-based propellant and modified double-based propellant. This method is based on the safety life criterion of simulating the limit heat flux of large-scale charge system which does not occur thermal explosion in harsh environment. It is more practical and the predicted results are more credible compared with the thermal accelerated aging method based on 50% stabilizer consumption. In addition, this method is on-line detection, without large-scale aging test, which is safe, simple and fast.This method can be used to predict whether nitrate propellant can be safely stored in 10 years within 4.01 days. ? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 10

Main heading: Propellants

Controlled terms: Calorimeters - Forecasting - Heat flux - Heat transfer - Large scale systems - Nitrates - Temperature - Testing - Thermodynamic stability

Uncontrolled terms: Accelerated aging - Harsh environment - Micro-calorimetry - On-line detection - Storage temperatures - Temperature coefficient - Thermal explosion - Time-temperature equivalence

Classification code: 641.1 Thermodynamics - 641.2 Heat Transfer - 804.2 Inorganic Compounds - 944.5 Temperature Measuring Instruments - 961 Systems Science

Numerical data indexing: Age 1.00e+01yr, Age 1.10e-02yr, Percentage 5.00e+01%

DOI: 10.14077/j.issn.1007-7812.201903030

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2020 Elsevier Inc.

Data Provider: Engineering Village

14. Steady Identification Method of Explosion Heat Measurement by Isothermal Calorimeter

Accession number: 20203809185657

Title of translation:

Authors: Yang, Jie (1); He, Yuan-Ji (1); Zhao, Hong-Wei (1); Chen, Hua (1); Han, Xiu-Feng (1); Zhan, Jun (1)

Author affiliation: (1) The 96901 Unit of the Chinese People’s Liberation Army, Beijing; 100094, China

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

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 4

Issue date: August 1, 2020

Publication year: 2020

Pages: 442-450

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: In view of the problems of the classical measurement method of constant temperature explosion heat, such as long measurement time, system failure and so on, a solution of identifying explosion heat based on prefault data was proposed. Initially, the heat transfer equation of calorimeter based on the hypothesis of explosive transient response was established, and the change rule of water temperature in inner barrel was obtained after solving. Based on the thought of system identification, the system identification method was obtained, which firstly identifies the indirect parameters of kNW/(cNmN), u1, λ1, λ2, secondly identifies the target parameters of TE(τM), kNZ/cNmN, kNZ/cZmZ, thirdly identifies the correctional raising temperature and explosion heat. The error analysis shows that the identification value of explosion heat can converge to the classical value steadily, and the influence of non transient reaction such as oxidation and combustion on the identification accuracy can be ignored. Ultimately, 8 kinds of typical explosive samples were simulated and analyzed, and the criterion of convergence time was proposed. The simulation results show that the identification value of detonation heat can converge to the classical value quickly and reliably under the condition of less than 3% relative error and 1/2 of the main and final stage. The test criterion can judge the convergence time of the identification value of detonation heat reliably and effectively reduce the risk of measurement failure caused by system fault. ? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 11

Main heading: Transient analysis

Controlled terms: Calorimeters - Combustion knock - Detonation - Explosions - Heat transfer - Religious buildings - Risk assessment - Thermal variables measurement

Uncontrolled terms: Constant temperature - Heat transfer equations - Identification accuracy - Identification method - Isothermal calorimeter - Measurement methods - System identification methods - Transient reaction

Classification code: 402.2 Public Buildings - 521.1 Fuel Combustion - 641.2 Heat Transfer - 914.1 Accidents and Accident Prevention - 944.5 Temperature Measuring Instruments - 944.6 Temperature Measurements

Numerical data indexing: Percentage 3.00e+00%

DOI: 10.14077/j.issn.1007-7812.202001022

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2020 Elsevier Inc.

Data Provider: Engineering Village

15. Composite Solid Rocket Propellant Based on GAP Polyurethane Matrix with Different Binder Contents

Accession number: 20203809185571

Authors: Boshra, Islam K. (1); Elbeih, Ahmed (2); Guo, Lin (1); Zaki, Mohamed G. (2)

Author affiliation: (1) School of Chemistry and Environment, Beihang University, Beijing; 100191, China; (2) Military Technical College, Kobry Elkobbah, Cairo, Egypt

Corresponding author: Elbeih, Ahmed(elbeih.czech@gmail.com)

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

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 4

Issue date: August 1, 2020

Publication year: 2020

Pages: 362-367

Language: English

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: Different GAP-based CSRP samples with different binder contents were prepared and compared with that of conventional HTPB propellant. The crosslinker mixture of trimethylol propane (TMP) and butane diol (BD) was used in the GAP matrix beside the addition of dibutyltin dilaurate (DBTDL) to ensure cross-linking and curing completion of the prepared CSRP. The viscosity and hardness of all prepared formulations were monitored continuously during the curing process. The mechanical characteristics of cured samples were tested. The burning rate at operating pressure and specific impulse were measured, while the theoretical specific impulse (Isp) was calculated by ICT code and compared with the measured results. According to the results, DOA was found to be a suitable plasticizer for GAP when using in propellant.The mechanical properties of CSRP with 25% GAP can produce the optimum mechanical behavior, which is close to that of HTPB-based CSRP. The optimum GAP-based formulation is one candidate to replace the traditional HTPB-based CSRP with high burning rate for some applications. ? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 25

Main heading: HTPB propellants

Controlled terms: Composite propellants - Curing - Mechanical properties - Rockets

Uncontrolled terms: Composite solids - Dibutyltin dilaurate - Different binders - Mechanical behavior - Mechanical characteristics - Operating pressure - Polyurethane matrix - Trimethylol propanes

Classification code: 654.1 Rockets and Missiles - 802.2 Chemical Reactions - 804 Chemical Products Generally - 951 Materials Science

Numerical data indexing: Percentage 2.50e+01%

DOI: 10.14077/j.issn.1007-7812.202004022

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2020 Elsevier Inc.

Data Provider: Engineering Village

16. Preparation and Properties of Heat-resistant Ammonium Nitrate Fuel Oil Explosive

Accession number: 20203809185493

Title of translation:

Authors: Liu, Wei (1); Guo, Zi-Ru (1); Wang, Yang (1); Gao, Zhong-Guo (2); Fang, Qi (1); He, Zhi-Wei (1); Song, Jia-Wang (3); Liu, Feng (1)

Author affiliation: (1) School of Chemical Engineering, Anhui University of Science and Technolagy, Huainan; Anhui; 232001, China; (2) Yahua Group Inner Mongolia Kodak Chemical Industry Co., Ltd., Baotou; Inner Mongolia; 014000, China; (3) Inner Mongolia Kangning Blasting Co., Ltd., Ordos; Inner Mongolia; 017000, China

Corresponding author: Guo, Zi-Ru(zrguo@aust.edu.cn)

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

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 4

Issue date: August 1, 2020

Publication year: 2020

Pages: 372-377

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: In order to improve the heat resistance of ammonium nitrate fuel oil (ANFO) and enhance the safety and efficiency in the blasting of high temperature overburdens (fire area blasting) for some overcast coal mine due to last coal combustion spontaneously, the effects of additive A, B and C on the thermal stability of ANFO were studied by C80 micro-calorimeter and a simple self made constant temperature testing setup with large sample quantities. The formulation of heat-resistant ANFO was confirmed by the detonation velocity of the samples. The results show that the activation energy of pure ANFO, ANFO with 5% additive A, ANFO with 5% additive B and ANFO with 5% additive C are 188.93, 208.76,203.54 and 201.14kJ/mol, respectively. All three additives can improve the heat resistance of ANFO, and A is the best on inhibiting the thermal decomposition of the ANFO. The detonation velocity of pure ANFO, ANFO with 5% additive A, ANFO with 5% additive B and ANFO with 5% additive C are 3522.5,3405.0,2142.5 and 2415.5m/s, respectively. The additive A has the smallest effect on the explosion performance of ANFO. A new type of heat-resistant ANFO was preliminarily designed through a series of experiments,and the formulation is as follows: the mass fraction ratio of porous ammonium nitrate and diesel oil is 94:6, and plus additive of 5%-8% A is added. The heat-resistant ANFO has high thermal stability under the high-temperature condition of 200-300, and it can be used reliably after a long time in the high temperature environment. The explosion power of heat-resistant ANFO can meet the requirements of the fire area blasting. ? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 15

Main heading: Petroleum additives

Controlled terms: Activation energy - Blasting - Calorimeters - Coal combustion - Coal industry - Coal mines - Combustion knock - Decomposition - Detonation - Fire resistance - Fuel additives - Fuel oils - Heat resistance - Nitrates - Safety testing - Specific heat - Thermodynamic stability

Uncontrolled terms: Constant temperature - Detonation velocity - High temperature - High temperature condition - High thermal stability - High-temperature environment - Micro-calorimeters - Safety and efficiencies

Classification code: 503 Mines and Mining, Coal - 503.1 Coal Mines - 521 Fuel Combustion and Flame Research - 521.1 Fuel Combustion - 523 Liquid Fuels - 524 Solid Fuels - 641.1 Thermodynamics - 802.2 Chemical Reactions - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 914.1 Accidents and Accident Prevention - 914.2 Fires and Fire Protection - 944.5 Temperature Measuring Instruments

Numerical data indexing: Percentage 5.00e+00%, Velocity 2.42e+03m/s

DOI: 10.14077/j.issn.1007-7812.201908002

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2020 Elsevier Inc.

Data Provider: Engineering Village

17. Research on Burning Rate Measurement by Mass Flow Rate Method Based on Working Principle of Solid Rocket Motor

Accession number: 20203809185628

Title of translation:

Authors: Wang, Ying-Hong (1); Zhang, Hao (1); Zhu, Qing-Long (1); Xue, Zhao-Rui (1); Yang, Hong (1)

Author affiliation: (1) Science and Technology on Combustion, Internal Flow and Thermal-Structure Laboratory, Northwestern Polytechnical University, Xi’an; 710072, China

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

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 4

Issue date: August 1, 2020

Publication year: 2020

Pages: 428-432

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: In order to obtain the burning rate of propellant under multiple pressures in a single engine test, the dynamic burning rate test method of solid propellant-mass flow rate method is proposed. This method is based on the mass flow rate calculated formula. By processing the pressure curve which increases with time in the combustion process of propellant, the burning rates at different times corresponding to the pressure during the entire engine operation were calculated. The burning rate results of double lead-2 (SQ-2) propellant by the mass flow rate method and the impulse method were compared. The effects of characteristic velocity and nozzle throat diameter changes on the burning rate rusults by the mass flow rate method were analyzed. The results show that the burning rate results obtained by the two methods are consistent with each other. When the pressure is 9.945MPa, the error is 1.06%, and when the pressure is 22MPa, the error is 3.87%. The main reason for the difference between the mass flow rate method and the impulse method is the change of nozzle throat diameter. ? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 9

Main heading: Flow rate

Controlled terms: Aircraft engines - Engines - Mass transfer - Nozzles - Solid propellants - Testing

Uncontrolled terms: Characteristic velocities - Combustion pro-cess - Engine operations - Impulse methods - Pressure curve - Propellant mass - Single engines - Solid rocket motors

Classification code: 524 Solid Fuels - 631 Fluid Flow - 641.3 Mass Transfer - 653.1 Aircraft Engines, General - 804 Chemical Products Generally

Numerical data indexing: Percentage 1.06e+00%, Percentage 3.87e+00%, Pressure 2.20e+07Pa, Pressure 9.94e+06Pa

DOI: 10.14077/j.issn.1007-7812.201912021

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2020 Elsevier Inc.

Data Provider: Engineering Village

18. Experimental Study on Free Loading of Rocket Motor with Large Aspect Ratio

Accession number: 20203809185597

Title of translation:

Authors: Zheng, Wei (1, 2); Chen, Jun-Bo (2); Pei, Jiang-Feng (2); Ma, Liang (2); Wang, Jiang-Ning (2); Song, Xiu-Duo (1, 2); Geng, Chao-Hui (2)

Author affiliation: (1) Science and Technology on Combustion and Explosion Laboratory, Xi’an; 710065, China; (2) Xi’an Modern Chemistry Research Institute, Xi’an; 710065, China

Corresponding author: Song, Xiu-Duo(song_xd@126.com)

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

Abbreviated source title: Huozhayao Xuebao

Volume: 43

Issue: 4

Issue date: August 1, 2020

Publication year: 2020

Pages: 433-436 and 441

Language: Chinese

ISSN: 10077812

CODEN: HUXUFP

Document type: Journal article (JA)

Publisher: China Ordnance Industry Corporation

Abstract: In order to solve the cracking problem of free loading in solid rocket motor grains with large aspect ratio at high temperature operation, taking a modified double-based propellant grain with screw extruded process as the research object, the factors influencing the working stability of free-loading screwed extruded CMDB propellant with large aspect ratio grains were investigated by solid rocket motor test. These factors include initial aerate parameter (æ), the thickness of bracket(d), inner hole coating. The results show that the structure of grain is the major reason which affects the working stabilility of free loading propellant grains with large aspect ratio, working stability can be improved obviously by reducing æ. For propellant grains with large aspect ratio of 12, æ reduced from 225 to 166, and the cracking problem disappears at 50 and is improved obviously at 60. It is benefit to improve the cracking problem of the propellant grains by increasing the thickness of bracket from 8mm to 25mm. The working stabilility of the propellant grains has no change with or without inner hole coating. ? 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Number of references: 12

Main heading: Aspect ratio

Controlled terms: Coatings - High temperature operations - Propellants - Rocket engines - Rockets

Uncontrolled terms: CMDB propellant - Cracking problem - Free-loading - Large aspect ratio - Propellant grain - Research object - Solid rocket motors - Working stabilities

Classification code: 654.1 Rockets and Missiles - 654.2 Rocket Engines - 813.2 Coating Materials

Numerical data indexing: Size 8.00e-03m to 2.50e-02m

DOI: 10.14077/j.issn.1007-7812.201903015

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2020 Elsevier Inc.

Data Provider: Engineering Village


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