CL-20热分解的动态真空安定性试验方法

Dynamic Vacuum Stability Test Method for Thermal Decomposition of CL-20

采用动态真空安定性试验（DVST）法,在真空密闭条件下对CL-20的热分解过程进行了研究。结果表明,在90-140℃,CL-20非等温阶段的热分解反应机理函数为Avrami-Erofeev方程,表观活化能Ea为165.3 kJ.mol-1,指前因子ln（A/s-1）为40.20。等温阶段热分解反应的机理函数随试验温度的不同而发生变化,反应速率常数随温度的升高呈指数形式增加,由90℃时的1.01×10-6s-1,升至140℃时的1.81×10-5s-1。CL-20在100℃时的放气量为0.502 mL.g-1,表明CL-20具有较好的热安定性。利用CL-20在110-140℃范围内分解0.1%所需时间的数据,拟合Semenov方程为lntT=13 996.1/T-27.013,外推得到室温25℃时CL-20的有效贮存寿命为14.4 a。

The thermal decomposition of CL-20 was investigated by dynamic vacuum stability test（DVST）.The results show that the mechanism function of non-isothermal decomposition of CL-20 is Avrami-Erofeev equation with n=4.The apparent activation energy Ea is 165.3 kJ·mol-1,and the pre-exponential factor ln（A/s-1） is 40.20.Isothermal decomposition mechanism function changes with temperature,the reaction rate constant increases exponentially with temperature from 1.01×10-6 s-1 at 90℃ to 1.81×10-5 s-1 at 140 ℃.The amount of decomposition gases of CL-20 tested at 100℃ is 0.502 mL·g-1,showing that the thermal stability of CL-20 is better.By fitting the Semenov equation,the effective storage life of CL-20 at 25℃ is 14.4 a.