3,4-二硝基吡唑的性能表征及应用

摘要

To explore the possibility of 3,4-dinitropyrazole(DNP) instead of TNT as a new carrier for melt-cast explosives.,its structure was characterized by optical microscope,FTIR spectrometer,UV VIS spectrophotometer,TG/DTA thermal analysis instrument.The heat of detonation and detonation velocity of DNP were respectively tested by an oxygen bomb calorimeter and the electrical measuring method.The detonation property parameters of DNP/CL-20 and TNT/CL-20 composite explosives were calculated by the VLW program.Results show that thermal decomposition of DNP,can be divided into two stages:ring's breaking、nitro's falling off from the ring of DNP and autocatalytic reaction.The apparent activation energy of thermal decomposition of DNP is 131 kJ · mol-1.The experimental values of heat of detonation and detonation velocity of DNP are 4326 kJ · kg-1 and 7633 m · s-1,respectively.The detonation performances of DNP/CL-20 composite explosive are better than those of TNT/CL-20 composite explosive.The calculated values of detonation pressure and detonation velocity of DNP/CL-20 mixed explosive are 39.4 GPa and 8961 m · s-1,respectively when DNP/CL-20=2 ∶ 3(mass ratio).%为了探究3,4-二硝基吡唑(DNP)替代TNT作为新型熔铸炸药载体的可行性,采用光学显微镜、傅里叶红外变换光谱仪、紫外可见分光光度计及DTA/TG热分析仪器对其结构进行了表征,利用氧弹量热仪、电测法分别测试了DNP爆热、爆速,并应用VLW程序计算了TNT/CL-20,DNP/CL-20混合炸药的爆轰参数.结果表明,DNP热分解过程主要分为吡唑环断裂和硝基脱环、自催化加速反应两个阶段,热分解表观活化能为131 kJ·mol-1;DNP爆热、爆速分别为4326 kJ·Kg-1、7633 m·s-1,计算得出DNP/CL-20混合炸药爆轰性能明显优于TNT/CL-20混合炸药,当DNP/CL-20=2∶3(质量比)时,计算爆压为39.4 GPa,爆速为8961 m·s-1.