摘要
为改善RDX的安全性能,用一种HP-1高分子材料作为包覆剂,采用喷雾干燥技术制备了RDX/HP-1超细包覆球形粒子,RDX与HP-1质量比为98∶2。利用SEM和XRD对RDX原料及RDX/HP-1进行了表征。同时,对两者的热分解性能与撞击感度进行了对比。结果表明,改性后的RDX/HP-1颗粒为规则的球形,粒度约0.3-3μm,形貌及粒度明显优于RDX原料,晶型与原料相同。RDX/HP-1的活化能与热爆炸临界温度分别为191.9 kJ/mol和237.2℃,RDX原料的活化能与热爆炸临界温度分别为174.0 kJ/mol和236.0℃,RDX/HP-1与RDX原料的等动力学点温度为235.1℃。RDX/HP-1的真空安定性优于RDX原料。RDX/HP-1与RDX原料的特性落高分别为61.5、20.6 cm。
In order to improve the safety performance of RDX,use a kind of high polymer（ marked as HP-1） as a coating agent. RDX/HP-1 ultrafine spherical composite particles were prepared by spray drying technology. The mass ratio of RDX to HP-1 was 98 ∶ 2.Scanning electron microscope（SEM） and X-ray diffraction（XRD） were employed to characterize raw RDX and RDX/HP-1. The thermal decomposition properties and impact sensitivity were also contrasted and analyzed. The results show that RDX/HP-1 particles which have been modified are spherical in shape and range from 0.3μm to 3μm in size.The morphology and particle size are better than that of raw RDX,and the crystal type of RDX/HP-1 is not changed.The activation energy and critical temperature of thermal explosion of RDX/HP-1 are 191. 9 kJ/mol and 237. 2 ℃, respectively, while that of raw RDX is 174. 0 kJ/mol and 236.0 ℃,respectively.The temperature of the equal kinetic point is 235.1℃.The vacuum stability of RDX/HP-1 is better than that of raw RDX.The drop height of RDX/HP-1 and raw RDX is 61.5 cm and 20.6 cm,respectively.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2015年第3期383-386,共4页
Journal of Solid Rocket Technology
关键词
RDX
喷雾干燥
球形化
热安定性
撞击感度
RDX
spray drying
spheroidization
thermal stability
impact sensitivity
