NTO包覆HMX的钝感研究

Research on Insensitivity of HMX Coated with NTO

为降低HMX的机械感度并维持其爆炸性能,采用溶液重结晶法用较钝感的3-硝基-1,2,4-三唑-5-酮(NTO)包覆HMX,并测试了其机械感度和爆速。通过SEM观察了包覆HMX的粒径、形貌及包覆钝感的工艺条件。结果表明,包覆HMX的表面形态主要受水与N-甲基吡咯烷酮(NMP)体积比、搅拌速率和冷却速率的影响。当水和NMP体积比为5、搅拌速率为300r/min、冷却速率为6K/min时,包覆HMX的表面形态最好;以水和NMP为溶剂,包覆HMX的H50值提高了14.8cm,撞击感度降低了66%,且摩擦感度从100%降低至50%。包覆HMX的爆速降低了2.8%,基本可以维持爆炸性能不变。

To reduce the mechanical sensitivity of HMX and maintain its detonation performance,the sensitive explosive HMX was coated with relatively insensitive explosive 3-nitro-1,2,4-triazol-5-one(NTO)by solution crystallization method.Its mechanical sensitivity and detonation velocity were measured.The particle size,morphology and coated insensitive process conditions of coated HMX were observed by SEM.The results show that the surface morphology of the coated HMX was predominantly influenced by volume ratio of water to NMP,strirring speed and cooling rate.When volume ratio of water to NMP was 5,agitation speed was 0.942r/min,and degree of sub-cooling was 6K/min,the surface morphology of the coated HMX was the best.Using water and NMP as solvents,the H50of the HMX coated in water and NMP enhances 14.8cm.It makes the impact sensitivity reduce by 66% and the friction sensitivity decreases from 100%to 50%.The detonation velocity of the coated HMX reduces by 2.8%,but explosion performances basically remaine unchanged.