Jin Bo, Shen Juan, Gou Xiaoshuang, Peng Rufang, Chu Shijin, Dong Haishan
State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010, China.
Department of Chemistry, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China.
Polymers (Basel). 2016 Jan 15;8(1):10. doi: 10.3390/polym8010010.
A series of energetic polymers, poly(vinyl 2,4,6-trinitrophenylacetal)--polyglycidylazides (PVTNP--GAPs), were synthesized via cross-linking reactions of PVTNP with three different molecular weight GAPs using toluene diisocyanate as the cross-linking agent. The structures of these energetic polymers were characterized by ultraviolet visible spectra (UV⁻Vis), attenuated total reflectance-Fourier transform-infrared spectroscopy (ATR-FTIR), and nuclear magnetic resonance spectrometry (NMR). The glass-transition temperatures of these energetic polymers were measured with differential scanning calorimetry (DSC) method, and the results showed that all the measured energetic polymers have two distinct glass-transition temperatures. The thermal decomposition behaviors of these energetic polymers were evaluated by differential thermal analysis (DTA), thermogravimetric analysis (TGA) and thermogravimetric analysis tandem infrared spectrum (TGA-IR). The results indicated that all the measured energetic polymers have excellent resistance to thermal decomposition up to 200 °C, and the initial thermal decomposition was attributed to the breakdown of azide group. Moreover, the sensitivity properties of these energetic polymers were measured with the national military standard methods and their compatibilities with the main energetic components of 2,4,6-trinitrotoluene (TNT)-based melt-cast explosive were evaluated by using the DTA method. The results indicate that these energetic polymers have feasible mechanical sensitivities and can be safely used with TNT, cyclotetramethylene tetranitramine (HMX), 1,1-diamino-2,2-dinitroethene (FOX-7), 3-nitro-1,2,4-triazol-5-one (NTO) and 1,3,5-triamino-2,4,6-trinitrobenzene (TATB).
通过以甲苯二异氰酸酯作为交联剂，使聚（2,4,6-三硝基苯乙缩醛）——聚缩水甘油叠氮化物（PVTNP——GAPs）与三种不同分子量的GAPs发生交联反应，合成了一系列含能聚合物。采用紫外可见光谱（UV⁻Vis）、衰减全反射傅里叶变换红外光谱（ATR-FTIR）和核磁共振光谱（NMR）对这些含能聚合物的结构进行了表征。用差示扫描量热法（DSC）测定了这些含能聚合物的玻璃化转变温度，结果表明，所有被测含能聚合物都有两个明显的玻璃化转变温度。采用差热分析（DTA）、热重分析（TGA）和热重分析串联红外光谱（TGA-IR）对这些含能聚合物的热分解行为进行了评估。结果表明，所有被测含能聚合物在高达200℃时都具有优异的热分解抗性，初始热分解归因于叠氮基团的分解。此外，用国军标方法测定了这些含能聚合物的感度性能，并采用DTA方法评估了它们与2,4,6-三硝基甲苯（TNT）基熔铸炸药主要含能组分的相容性。结果表明，这些含能聚合物具有可行的机械感度，可与TNT、环四亚甲基四硝胺（HMX）、1,1-二氨基-2,2-二硝基乙烯（FOX-7）、3-硝基-1,2,4-三唑-5-酮（NTO）和1,3,5-三氨基-2,4,6-三硝基苯（TATB）安全使用。
