高品质HMX的包覆降感技术

为进一步降低高品质HMX的感度,采用石蜡(W)、热塑性聚氨酯(TPU)等材料为钝感包覆剂,对高品质HMX(D-HMX)进行了表面包覆.先通过测试接触角、计算表面能验证了W及TPU等材料包覆D-HMX的可行性.用SEM、XPS对包覆效果进行了表征,对包覆前后样品的机械感度进行了测试和对比.结果表明,W及W与TPU的复合可对D-HMX进行完整的包覆,使D-HMX的撞击感度由80％降低16％,而摩擦感度由72％进一步降低到4％,获得钝感复合炸药粒子;W在非水介质Novec7200中对D-HMX的包覆度更高,撞击感度降至0％,降感作用更好.

Desensitizing Technology of High Quality HMX by Coating

The desensitizing technology of high-quality HMX were studied by coated with wax (W) or thermoplastic polyurethane (TPU) as insensitive coating additive. The feasibility study of high-quality HMX coated by W and TPU were proved through contact angle and surface energies. Then the samples were characterized by using SEM and XPS. The mechanical sensitivity of HMX samples before and after coating was measured and compared. The coating integrality and desensitizing effect of D-HMX coated by W in water and non-agueous media (Novec 7200), respectively. The results show that the high-quality HMX are coated entirely by W and TPU and the impact and friction sensitivity of high-quality HMX coated by W decreases significantly from 88% to 16%, from 92% to 4%, respectively. It indicats that D-HMX is coated entirely and more insensitive which the impact sensitivity fall to 0% while coated in non-aqueous media (Novec 7200) than in water.