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含能材料  2010 

动态真空安定性试验(DVST)方法研究(Ⅱ):RDX的热分解

DOI: 10.3969/j.issn.1006-9941.2010.04.007

Keywords: 物理化学,动态真空安定性试验(DVST),黑索今(RDX),动力学参数,机理函数

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Abstract:

运用动态真空安定性试验(DynamicVacuumStabilityTest,DVST)方法研究了RDX的热分解过程,对测试数据拟合求解得出RDX在非等温阶段的分解机理函数为Avrami-Erofeev方程(n=4),表观活化能为174.10kJ·mol-1,lnA为34.45;等温阶段的分解机理函数为Anti-Jander方程模型,即G(α)=(1-2/3α)-(1-α)2/3,反应速率常数k=1.63×10-5s-1。分解气相产物在标准状态下为0.10mL·g-1。实验不仅得到了与真空安定性试验(VST)方法相吻合的分解最终结果,还得到了合理有效的动力学参数,证明了DVST方法的科学性和可靠性。实验实时跟踪了RDX的分解过程,得到了分解过程中各物理量的变化信息,为RDX的安全储存、可靠使用提供更为有效的数据。

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