原位聚合包覆HMX的研究

为探索制备PBX的新方法,利用原位聚合反应,直接在HMX表面包覆一层热塑性高聚物,获得了分别以端羟基聚丁二烯(HTPB),聚叠氮缩水甘油醚(GAP)、3,3-双(叠氮甲基)环氧丁烷-四氢呋喃共聚醚(BAMO-THF)3种黏结剂包覆的PBX.通过光学显微镜、显微-红外、光电子能谱(XPS)、元素分析和机械感度测定对包覆效果进行表征.结果表明,HMX表面较均匀地包覆上了一层聚合物,黏结剂的质量分数约为4%～5%,包覆HTPB的HMX机械感度明显下降,而包覆GAP和BAMO-THF的HMX机械感度略有降低.

Study on HMX Coated by In-Situ Polymerization

In order to find a new method for preparing plastic bonded explosive(PBX) moulding powders,syclotetramethylene tetranitramine(HMX) was coated by a layer thermoplastic polymer using in-situ polymerization,and three kinds of HMX moulding powders coated by hydroxy-terminated polybutadiene(HTPB),glycidyl azide polymer(GAP),copolymer of 3,3-bis-azidomethyl oxetane and tetrahydrofuran(BAMO-THF) respectively were prepared accordingly.The moulding powders were analyzed by optical microscope,microscope-FTIR,and XPS,elemental analyses,impact sensitivity and friction sensitivity.The results show that HMX particles were uniformly coated by a layer of polymer.The content of binder is about 4%-5%.In comparison with pure HMX,mechanic sensitivity of HMX particles coated by HTPB had a remarkable decrease,but those by GAP and BAMO-THF only had a slightly decrease.