聚丙烯酸酯对HMX包覆改性的研究

摘要

Molecular dynamics(MD) method was used to simulate and calculate the binding energy of binder with HMX, it indicated that polyacrylic ester(ACM) is better than fluororubber (F2602).Based on octagon(HMX), solution-water suspension was used to coating HMX with ACM and F2602, and the coated sample was characterized and tested. The experimental results show that the HMX coated with 2% ACM had lower critical thermal explosion ambient temperature, but higher active energy of surface and decomposition rate than that of HMX coated with 5% F2602, and had good formation without rebound phenomenon. TheH50 (2.5kg drop hammer) was improved 13.3cm than that of the same proportion of HMX coated with 2% F2602, and improved 8.5cm than that of HMX coated with 5% F2602. The study showed that ACM can be used for binder of HMX.%利用分子动力学(MD)模拟,得到聚丙烯酸酯(ACM)与HMX的结合能高于氟橡胶(F 2602 )与HMX的结合能.采用溶液-水悬浮法,以ACM、F 2602为钝化包覆剂,对主体炸药HMX进行包覆改性,并对包覆的HMX样品进行表征及性能测试.结果表明:2%ACM包覆的HMX样品热爆炸临界温度低于5%F 2602包覆的HMX,但表观活化能、分解速率常数高于 5%F 2602包覆的HMX;药柱成型良好,无反弹现象;其特性落高H 50比 2%F 2602包覆的HMX特性落高提高了13.3cm,比5%F 2602包覆的HMX提高了8.5cm.说明ACM可以作为HMX的粘结剂.