2,6-二氨基-3,5-二硝基吡啶-1-氧化物和RDX基PBX的制备与表征

Preparation and Characterization of 2,6-Diamino-3,5-dinitropyridine-1-oxide and RDX-based Polymer Binder Explosives

采用溶液-水悬浮-蒸馏法,分别以丁腈橡胶(NBR-26)、氟橡胶2311和2603为黏结剂,2,6-二氨基-3,5-二硝基吡啶-1-氧化物(ANPyO)和RDX为主体炸药制备了3种高聚物黏结炸药(PBX)。用激光粒径分析、扫描电镜、差示扫描量热法、热重分析法、机械感度等对3种PBX的结构和性能进行了表征。结果表明,PBX的平均粒径比较接近,约为50μm,比表面积在0.5m2/g左右;熔融吸热峰位于206.5℃附近,分解放热峰在231～235℃之间;撞击感度和摩擦感度分别为44%和32%。3种PBX的热稳定性低于ANPyO,机械感度低于RDX。

There kinds of 2,6-diamino-3,5-dinitropyridine-l-oxide（ANPyO） and hexogen-based polymer bonded ex-plosives molding powder were prepared via a solution-water suspending-distillation method using nitrile-butadiene rubber（NBR-26）, fluorine hubher 2 311 and 2 603 as hinders. The structures and properties of three PBX samples were characterized by laser particle size analysis, scanning electron microscope, differential scanning calorimetry, thermograimetry, impact and friction sensitivity and detonation velocity tests. Results show that the average particle size of the PBX samples are close and located near 50μm, the BET specific surface area are 0.5 m^2· g^-1 or so; the melting endothermic peaks of the PBX samples are about 206.5℃, the decomposition peaks are between 231-235℃, and the impact and friction sensitivity of ones are 44% and 32%, respectively. The thermal stability of PBX samples are lower than that of ANPyO and mechanical sensitivity of PBX samples are lower than that of RDX.