Dynamic vacuum stability test method for thermal decomposition of CL-20

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 E, is 165. 3 kj · mol^-1, and the pre-exponential factor In (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°C to 1. 81 × 10^-s s ^-1 at 140 °C. The amount of decomposition gases of CL-20 tested at 100°C 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°C is 14. 4 a.