CMDB推进剂RDX填料表面包覆对其机械感度和力学性能的影响

为了改善RDX-CMDB推进剂的安全性能和力学性能,用一种含能高分子材料(记为HP-1)和一种胺类物质(记为AM)对RDX填料进行了表面包覆。用SEM和XPS对包覆样品的包覆效果进行了表征,对包覆前后RDX样品的撞击感度、摩擦感度及CMDB推进剂的机械感度和力学性能进行了测试和对比。结果表明,单独用HP-1包覆的样品机械感度没有明显变化;而随着AM用量的增加,样品的摩擦感度和撞击感度都有下降的趋势,当HP-1和AM的含量分别为1%和0.5%时,样品的特性落高升高了约17 cm,摩擦爆炸概率由92%降到58%。通过对RDX填料进行包覆,CMDB推进剂的撞击感度没有明显变化,而摩擦感度由58%降到4%,各个温度下的力学性能也得到了很大改善。

Influence of surface coating of RDX fillers on mechanical sensitivity and properties of CMDB propellant

In order to improve safe and mechanical properties of the RDX-CMDB propellants,RDX fillers were coated with a kind of energetic high polymer(marked as HP-1) and a kind of amine material(marked as AM).The coated samples were characterized by means of SEM and XPS.The mechanical sensitivity of pre-and post-coated RDX samples was measured and contrasted,meanwhile the mechanical sensitivity and properties of CMDB propellants made with pre-and post-coated RDX were investigated respectively.The results indicate that the mechanical sensitivity of the sample merely coated with HP-1 varies scarcely,but the impact and friction sensitivity of samples decreases with the increase of the content of AM.When the content of HP-1 and AM are up to 1% and 0.5% respectively,the special height of the coated sample is higher about 17 cm than that of pure RDX,and the friction explosive probability reduces from 92% to 58%.with surface-coating RDX fillers,the impact sensitivity of CMDB propellant doesn't vary obviously,but its friction sensitivity reduces from 58% to 4%,and the mechanical properties are greatly improved at various temperatures.