含能材料2025，Vol.33Issue(4)：347-354,8.DOI:10.11943/CJEM2025033
APNIMMO/RDX光固化发射药热分解性能及燃烧性能
Thermal Decomposition and Combustion Performance of APNIMMO/RDX Photocurable Gun Propellant
李曼曼 1徐明辉 1郭志罡 1岳春晖 1王琼林 1杨伟涛1
作者信息
- 1. 西安近代化学研究所,陕西 西安 710065
- 折叠
摘要
Abstract
In order to investigate the effects of a new energetic photocurable binder terminal acrylate based poly(3-nitratometh-yl-3-methyloxetane)(APNIMMO),on the thermal decomposition and combustion properties of RDX-based photocurable gun propellants,a high-energy APNIMMO/RDX gun propellant sample was designed and fabricated by 3D printing.The thermal de-composition process and related kinetic parameters of the APNIMMO/RDX photocurable gun propellant were studied using dif-ferential scanning calorimetry(DSC)and thermogravimetry-differential scanning calorimetry-Fourier transform infrared spectroscopy-gas chromatography(TG-DSC-FTIR-GC).The combustion performance of the APNIMMO/RDX photocurable gun propellant was evaluated using a closed bomb tester.The results indicate that the thermal weight loss of the APNIMMO/RDX pho-tocurable gun propellant occurs in two main stages.Thermogravimetry and gas product escape mainly focus on the first stage(158.9-234.3℃),In this stage,tthe thermal decomposition of APNIMMO/RDX begins with the exothermic decomposition of APNIMMO,promoting the melting and decomposition of RDX.This causes RDX to decompose earlier,leading to a lower criti-cal explosion temperature(Tpe)for APNIMMO/RDX compared to pure RDX.The second stage(234.3℃to the end of the test)presents a"thermal neutral"state with neither exothermic nor endothermic behavior,mainly attributed to the slow decomposi-tion of the APNIMMO backbone after the complete decomposition of its side-chain nitrate ester groups.The results of combus-tion performance show that the burning rate coefficient of APNIMMO/RDX propellant is low,the pressure index is high,and there are a large number of holes on the surface of the sample of the aborting combustion test.The analysis shows that in the APNIMMO/RDX propellant system,the burning rate of RDX is higher than that of APNIMMO binder under high pressure due to the large content of RDX.The difference in burning rate between the two causes the heat and pressure generated by combustion to penetrate into the entire propellant along the formed holes,and the process is greatly affected by pressure,so the pressure in-dex is high.关键词
端丙烯酸酯基聚3-硝酸酯甲基-3-甲基氧杂环丁烷(APNIMMO)/光固化黏结剂/发射药/热分解性能/燃烧性能Key words
APNIMMO(Terminal acrylate-based poly 3-nitratomethyl-3-methyl oxetane)/photocurable binder/gun propellant/thermal decomposition/combustion properties分类
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李曼曼,徐明辉,郭志罡,岳春晖,王琼林,杨伟涛..APNIMMO/RDX光固化发射药热分解性能及燃烧性能[J].含能材料,2025,33(4):347-354,8.
