量气法研究CL-20热分解动力学

Study on Thermal Decomposition Kinetics of Hexanitrohexaazaisowurtzitane by Gasometric Method

采用一种新型的热稳定性量气测试系统“拉瓦”装置,在接近真空的密闭条件下对CL-20的全分解过程进行恒温实时监测。实验结果表明,CL-20全分解放出的气体量为628.5 mL·g^-1;在170～200℃范围内,分解深度为0%～50%范围内时,其反应机理函数符合成核和生长（n=1.5）的Avrami-Erofeyev方程;表观活化能和指前因子分别为Ea=174.1 kJ·mol^-1,ln（A/s^-1）=42.34。

The thermal decomposition process of hexanitrohexaazaisowurtzitane （HNIW, CL-20） under vacuum was investigated by a new gasometric instrument（ LAWA ） for testing material thermal stability. The experiment shows the Vmax is 628.5 mL · g^-1 and the decomposition reaction for the 0 - 50% range of conversion degree of CL-20 follows the Avrami-Erofeyev equation in the temperature range 170 -200 ℃ ; the activation energy Ea is 174.1 kJ · mol^-1 and In（A/s^-1 ） is 42.34. The results was compared with that by Bourdon manometer,isothermal thermogravimetry （TG） and DSC methods.