重结晶工艺对太安撞击感度的影响

Influences of Recrystal Technology on the Impact Sensitivity of PETN

用溶剂-非溶剂法重结晶粗制太安,研究了溶剂-非溶剂体系、重结晶温度、搅拌速度和非溶剂滴加速度4个因素对重结晶太安撞击感度的影响。测定了不同工艺条件下重结晶太安的特性落高,通过金相显微镜和偏光显微镜分析了不同结晶工艺所得太安晶体的形貌及表观缺陷,讨论了重结晶工艺对太安晶体撞击感度的影响。结果表明,以乙酸乙酯为溶剂,三氯甲烷为非溶剂,温度50℃,非溶剂稀释速度0.05mL/min,搅拌速度100r/min条件下制备的重结晶太安的特性落高为14.6cm,比常用的丙酮-水重结晶太安的撞击感度显著降低。

Effects of solvent non solvent, temperature, stirring speed and dilution rate on the impact sensitivity of recrystallized PETN were studied by single factor test. The impact sensitivity of different recrystallized PETN was characterized with 50% drop height （H50） . Crystal shape and surface defects of different recrystallized PETN are observed with an optical microscope and a metallographie microscope. The influence of recrystallization technology on the impact sensitivity of PETN crystal is ulteriorly analyzed from crystal shape and surface defects. Single factor experimental results showed that PETN particle with H50 14.6cm can be got when ethyl acetate as solvent, temperature 50℃, dilution rate 0. 05mL/min, stirring speed 100r/min. The impact sensitivity of PETN recrystallized from ethyl acctate is much lower than that recrystallized from acetone-water in industry.