HMX/RDX复合物细化与热分解特性研究

Refinement and Thermal Decomposition of HMX/RDX Complex

为了回收利用HMX生产过程中产生的HMX/RDX复合物,采用溶剂-非溶剂重结晶法在DMSO-无水乙醇体系中对HMX/RDX复合物进行细化;采用粒度仪及差示扫描量热仪(DSC)分别对细化前后HMX/RDX复合物的粒度及热分解行为进行研究,并对其热分解反应的表观活化能、热分解参数以及安定性参数进行计算。结果表明:细化前后HMX/RDX复合物表观活化能平均值分别为169.11 kJ∙mol^(-1)和152.00kJ∙mol^(-1);热爆炸临界温度分别为500.37K和508.70K;自加速分解温度分别为488.06K和494.54 K,细化后HMX/RDX复合物的热安定性更高。

In order to study the recovery and utilization of HMX/RDX complex produced during HMX production,the refined HMX/RDX complex was prepared by solvent-nonsolvent recrystallization method in DMSO-ethanol system.The particle size and thermal decomposition behavior of HMX/RDX complex and refined HMX/RDX complex were measured and analyzed.Then the apparent activation energy,the thermodynamic parameters and stability parameters were calculated.The results show that the apparent activation energy of HMX/RDX complex before and after refining are 169.11 kJ∙mol^(-1) and 152.00 kJ∙mol^(-1),the critical temperature of thermal explosion are 500.37 K and 508.70 K,and the self-accelerate decomposition temperature are 488.06 K and 494.54 K,respectively.The study show the thermal stability of refined HMX/RDX complex is higher than that of HMX/RDX complex.