5，5′-联四唑-1，1′-二氧二羟胺的热分解动力学

摘要

在线性升温速率2．0、5．0、10．0和20．0 K／min 的条件下，采用热重-差热分析法（TG-DTA）测试5，5′-联四唑-1，1′-二氧二羟胺（TKX-50）的热分解行为，用 Dzawa 法和 Kissinger 法研究了其热分解动力学参数。结果表明， TKX-50的热分解过程可分为两个阶段，第一分解阶段活化能为147．05 kJ／mol，指前因子为1012．91 s－1，受二维扩散机理控制，反应机理服从 n ＝1／2的 Jander 方程，热分解反应的动力学方程可表示为：dαdT ＝1012．91β×4（1－α）121－（1－α）[]1212 e 14705 RT 。%The thermal decomposition behavior of dihydroxylammonium-5,5′-bistetrazole-1,1′-diolate (TKX-50 ) was studied by TG-DTA at heating rates of 2.0,5.0,10.0 and 20.0 K/min and its thermal decomposition kinetic pa-rameters were studied by Ozawa′s and Kissinger′s methods.Results show that the thermal decomposition process of TKX-50 can be divided into two stages.The activation energy and pre-exponential factor for the first stage are 147. 05 kJ/mol and 10 12 .91 s-1 ,respectively.Thermal decomposition of the first stage is controlled by the mechanism of 2D diffusion,and the reaction mechanism obeys the Jander equation with n=1/2.The kinetic equation for the first decomposition stage can be expressed as:dαdT =10 12 .91β ×4(1-α) 1 2 1-(1-α) [ ] 1 2 1 2 e 14705 RT .