ABSTRACT

In this work, DSC tests were performed on 1-methyl-3,4,5-trinitropyrazole (MTNP) and 1,3,3-trinitroazetidine (TNAZ) binary eutectic systems with different molar ratios, and we drawn the T-X and H-X phase diagrams. We get the ratio of MTNP/TNAZ eutectic system by phase diagram, and the eutectic of the two were characterized by Energy spectrum analysis(EDS), X-ray diffraction(XRD), fourier transform infrared spectroscopy (IR), X-ray photoelectron spectroscopy (XPS), thermodynamic analysis, thermo gravimetric mass spectrometry (TG-MS), thermal sensitivity test, mechanical sensitivity test and detonation performance calculation. The results show that the ratio of MTNP/TNAZ eutectic system is 46.3/53.7, and the melting point is 72.58°C. EDS shows that there is no impurities in the lowest eutectic mixture. XRD indicates that there is some intermolecular force between the lowest eutectics mixture, which changes the diffraction peak. IR shows that the raw MTNP and raw TNAZ do not react with each other after forming the lowest eutectic mixture. Thermodynamic analysis indicates that the thermal decomposition reaction of the lowest eutectic mixture requires endotherm, and the entropy value of the reaction is decreased. Thermo gravimetric mass spectrometry (TG-MS) shows that the main decomposition products of the lowest eutectic mixture are CH₄, N₂O, CO₂, H₂, H₂O, and only a small amount of NH₃, and thermal decomposition of it is more complete than raw materials. Then the mechanical sensitivity of the raw MTNP, TNAZ and the lowest eutectic were tested, and the detonation performance were also calculated, the results show that the lowest eutectic has good mechanical sensitivity and detonation performance. Finally, the thermal sensitivity test was carried out on the raw materials and the lowest eutectic mixture, and it was found that the lowest eutectic mixture had the lowest activation energy, which is more conducive to thermal decomposition.

摘要

在这项工作中，对不同摩尔比的 1-甲基-3,4,5-三硝基吡唑 (MTNP) 和 1,3,3-三硝基氮杂环丁烷 (TNAZ) 二元共晶体系进行了 DSC 测试，我们绘制了 TX 和 HX 相图表。通过相图得到MTNP/TNAZ共晶体系的比例，并通过能谱分析（EDS）、X射线衍射（XRD）、傅里叶变换红外光谱（IR）、X射线光电子对两者的共晶进行了表征。光谱（XPS）、热力学分析、热重质谱（TG-MS）、热敏测试、机械敏感性测试和爆轰性能计算。结果表明，MTNP/TNAZ共晶系比为46.3/53.7，熔点为72.58℃。EDS 表明在最低的共晶混合物中没有杂质。XRD表明最低共晶混合物之间存在一定的分子间作用力，从而改变了衍射峰。IR 表明，在形成最低共晶混合物后，未加工的 MTNP 和未加工的 TNAZ 不会相互反应。热力学分析表明，最低共晶混合物的热分解反应需要吸热，反应的熵值降低。热重质谱 (TG-MS) 表明，最低共晶混合物的主要分解产物是 CH 并且反应的熵值减小。热重质谱 (TG-MS) 表明，最低共晶混合物的主要分解产物是 CH 并且反应的熵值减小。热重质谱 (TG-MS) 表明，最低共晶混合物的主要分解产物是 CH₄、N ₂ O、CO ₂、H ₂、H ₂ O，只有少量的NH ₃，热分解比原料更完全。然后测试了生MTNP、TNAZ和最低共晶的机械敏感性，并计算了爆轰性能，结果表明最低共晶具有良好的机械敏感性和爆轰性能。最后对原料和最低共晶混合物进行热敏性测试，发现最低共晶混合物的活化能最低，更有利于热分解。