含能材料2025，Vol.33Issue(2)：110-116,7.DOI:10.11943/CJEM2025004
CL-20/MNP共晶炸药的制备与表征
Preparation and Characterization of CL-20/MNP Cocrystal
摘要
Abstract
In order to reduce the mechanical sensitivity of hexanitrohexaazaisowurtzitane(CL-20),the cocrystal explosives CL-20/3-MNP(cocrystal 1)and CL-20/4-MNP(cocrystal 2)were prepared by cocrystal technology by combining the isomeric molecules of CL-20 and methyl-nitropyrazole(MNP):1-methyl-3-nitropyrazole(3-MNP)and 1-methyl-4-nitropyrazole(4-MNP).The structure of the single crystal was determined by single crystal X-ray diffractometer(SXRD),and the thermal properties and impact sensitivity of the cocrystal were measured by differential scanning calorimetry(DSC)and BAM drop weight impact sensi-tivity instrument,and the detonation performance was predicted by EXPLO5.The results show that cocrystal 1 is a triclinic crys-tal system with a P1ˉ space group.Cocrystal 2 is an orthorhombic crystal system with a Pbca space group.The melting points of cocrystal 1 and cocrystal 2 are 113.2℃and 147.2℃,respectively,which are 25.2℃and 53.7℃higher than those of 3-MNP and 4-MNP,respectively,and the decomposition temperature is higher than that of CL-20,which has better thermal stability,and the impact sensitivity of cocrystal 1 and cocrystal 2 is 20 J and 18 J,respectively,which effectively reduces the sensitivity of CL-20(2.5 J).The theoretical detonation velocity is 8060 m·s-1 and 8643 m·s-1,and the theoretical detonation pressure is 26.16 GPa and 32.61 GPa,respectively,which are lower than those of CL-20,and the cocrystal 2 sensitivity and detonation per-formance are comparable to those of LLM-105(17 J,8560 m·s-1,34.99 GPa),which is expected to be used as a new high-energy and low-inductance cocrystal explosive.关键词
六硝基六氮杂异伍兹烷(CL-20)/1-甲基-3-硝基吡唑(3-MNP)/1-甲基-4-硝基吡唑(4-MNP)/CL-20/MNP共晶炸药Key words
hexanitrohexaazaisowurtzitane(CL-20)/1-methyl-3-nitropyrazole(3-MNP)/1-methyl-4-nitropyrazole(4-MNP)/CL-20/MNP cocrystal分类
军事科技引用本文复制引用
马凡,刘泽宁,宁霆曜,乔申,杨宗伟,梁金虎..CL-20/MNP共晶炸药的制备与表征[J].含能材料,2025,33(2):110-116,7.基金项目
国家自然科学基金(22275175,21975233) Grant support:National Natural Science Foundation of China(Nos.22275175,21975233) （22275175,21975233）
