微/纳米HMX颗粒级配对PBX性能的影响

Effects of Nano/Micrometer HMX Particle Gradation on PBX Properties

为了提升高聚物粘结炸药(PBX)的综合性能,通过颗粒级配的方式,将低感度的微米和纳米奥克托今(HMX)应用到压装型PBX中,采用溶液-水悬浮法制备了4种HMX基PBX造型粉,并压制成药柱。对不同微纳米颗粒级配的JO-1、JO-2、JO-3和JO-4样品(粗颗粒/微米/纳米HMX的质量比分别为100/0/0、60/35/5、60/30/10、60/25/15),观测其表面微观结构,测量组分含量、撞击感度、摩擦感度、热分解特性、抗压性能和爆速等参数,并进行对比分析和讨论。结果表明,当粗颗粒(d_(50)=100μm)/微米(d_(50)=1μm)/纳米(d_(50)=100 nm)HMX的质量比为60/30/10时,所制备的JO-3样品有最好的性能。与单一粗颗粒HMX基PBX的JO-1样品相比,JO-3样品表面更光滑,撞击感度降低了38.3%,摩擦感度降低了22.7%,自发火温度提高了5.17℃,抗压强度提高了46%,爆速提高了55 m·s^(-1),HMX基PBX的综合性能显著提升。

To improve the comprehensive performance of polymer bonded explosives(PBXs), low sensitivity nano-HMX and micrometer HMX were applied to PBX by particle gradation. Four molding powders were prepared by solution-water slurry method and pressed into explosive cylinders. The surface micro structures of JO-1,JO-2, JO-3 and JO-4 sampls( coarse/micro meter/nano-HMX mass ratios with 100/0/0,60/35/5,60/30/10 and 60/25/15,respectively) were observed and the component contents, impact sensitivities,friction sensitivities,thermal decomposition characteristics, compression properties and detonation velocities were measured.Results show that JO-3 sample has the best properties. Compared to the JO-1 sample with single coarse HMX(d_(50)=100 μm), JO-3 sample has the smoother surface,and the impact sensitivity is reduced by 38.3%, the friction sensitivity is reduced by 22.7%, the selfignition temperature is increased by 5.17℃, the compression strength is enhanced by 46%, and the detonation velocity is increased by55 m · s^(-1). The HMX based PBX comprehensive performance is improved significantly.