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在升温速率分别为5 K·min~(-1)、10 K·min~(-1)、20K·min~(-1)条件下,用DSC研究了2,6-二氨基-3,5-二硝基-1-氧吡嗪(LLM-105)的热分解反应动力学参数,并在此基础上考察了该炸药的热爆炸临界温度和500d自爆温度;确定了该反应的微分形式的动力学模式函数f(a)、表观活化能(E_a)、指前因子(A)、热分解动力学方程和120℃时的分解速率常数K_0研究表明,反应的活化熵(△S~■)、活化焓(△H~■)和活化自由能(△G~■)分别为176.05J·mol~(-1)·K~(-1)、305.60kJ·mol~(-1)和198.22kJ·mol~(-1);LLM-105炸药的热爆炸临界温度和500d自爆温度分别为347.26℃和239.42℃。
Under the conditions of heating rate of 5 K · min -1, 10 K · min -1 and 20 K · min -1, the content of 2,6-diamino-3,5 The thermal decomposition kinetic parameters of dinitro-1-oxopyrazine (LLM-105) were investigated. Based on this, the critical thermal explosion temperature and the self-explosion temperature of 500d were investigated. The differential forms The kinetic model functions f (a), apparent activation energy (E_a), pre-exponential factor (A), thermal decomposition kinetic equation and the decomposition rate constant K_0 at 120 ℃ showed that the activation entropy (△ S ~ ), The enthalpy of activation (△ H ~ ■) and the activation energy (△ G ~ ■) were 176.05J · mol -1 · K -1, 305.60kJ · mol -1 and 198.22 kJ · mol ~ (-1). The critical temperature of thermal explosion and the self-explosion temperature of 500d for LLM-105 were 347.26 ℃ and 239.42 ℃ respectively.