Effects of aging on mechanical sensitivity threshold and thermal decomposition characteristic of RDX/HMX  

作　　者：Shian Zhang Yanru Wang Zeshan Wang Deyun Liu Mingkun Fang Zhiyong Ma Xingliang Wu Xibo Jiang Sen Xu Dabin Liu 

机构地区：[1]School of Chemistry and Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China [2]China North Industries Group Corporation,Beijing 100821,China [3]National Key Laboratory of Energetic Materials,Xi'an 710000,China [4]China National Quality Inspection and Testing Center for Industrial Explosive Materials,Nanjing 210094,China

出　　处：《Defence Technology(防务技术)》2025年第3期62-72,共11页Defence Technology

基　　金：supported by the National Key Laboratory of Energetic Materials, China (Grant No. 2023-LB-036-09).

摘　　要：In order to analyze the influences of storage aging on the safety of typical elemental explosives,the aged cyclotrimethylene trinitramine(RDX)and cyclotetramethylene tetranitramine(HMX)were prepared by isothermal aging tests.The reaction thresholds of aged RDX and HMX under any ignition probability were studied by Langlie-Optimal D method.The thermal decomposition characteristics of RDX and HMX after aging were analyzed by DSC and ARC.Experimental results showed that compared with unaged RDX and HMX,on the one hand,the critical impact energy and critical friction of RDX and HMX aged for 14,28,and 56 days are significantly reduced at an explosion probability of 50%,0.01%,and 0.0001%,respectively.With the increase of aging time,the mechanical sensitivity of RDX and HMX increases obviously.On the other hand,the initial decomposition temperature of RDX and HMX after 56 days of aging decreases,the decomposition heat decreases,the activation energy increases,and the reaction difficulty increases.

关 键 词：RDX HMX 71℃isothermal aging Langlie-optimal D method Mechanical sensitivity Thermal decomposition characteristic 

分 类 号：TQ5[化学工程]