摘要
通过NBK型＂拉瓦＂材料热稳定性测试系统研究了DTHL熔铸含铝混合炸药的全分解过程,得到分解放出气体压力p和放气量VH与时间t的关系曲线,并对其进行了初始热分解动力学分析和贮存寿命预估。结果表明,DTHL熔铸炸药在110-140℃范围内,其初始热分解反应机理函数符合成核和生长（n=2）的Avrami-Erofeyev方程;表观活化能和指前因子分别为Ea=120.29kJ·mol^-1,A=10^9.99s^-1。以放气量2mL/g为临界点,用Berthlot方程外推得到DTHL熔铸炸药在25℃和20℃条件下的贮存寿命为18.8年和30.7年。
The initial thermal decomposition process of DTHL melt-cast explosive was investigated by a NBK LAWA instrument for testing material thermal stability.The p-t and VH-t curves of thermal decomposition for DTHL explosive were obtained.Its decomposition reaction kinetics was analyzed and its storage life estimated.The results show that the mechanical function of initial decomposition follows the Avrami-Erofeyev equation（n=2） in the temperature range 110-140℃,the activation energy Ea is 120.29kJ·mol^-1 and A is 10^9.99s^-1.Based on VH=2mL/g as a criterion of failure,the storage lifes of DTHL explosive were estimated by Berthlot′s equations to be 18.8 years for 25℃ and 30.7 years for 20℃.
出处
《火炸药学报》
EI
CAS
CSCD
北大核心
2010年第3期47-50,共4页
Chinese Journal of Explosives & Propellants
关键词
物理化学
熔铸炸药
热分解
动力学参数
贮存寿命
physical chemistry
melt-cast explosive
thermal decomposition
kinetic parameter
storage life
