动态真空安定性试验方法研究(Ⅳ):HMX的热分解  

Dynamic Vacuum Stability Test(DVST) Method(Ⅳ):Thermal Decomposition of HMX

作　　者：刘芮[1] 尹艳丽[2] 张同来[1] 杨利[1] 张建国[1] 周遵宁[1] 乔小晶[1] 王文杰[1] 王丽琼[1] 

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081 [2]装甲兵工程学院再制造系国防科技重点实验室,北京100072

出　　处：《含能材料》2011年第6期650-655,共6页Chinese Journal of Energetic Materials

基　　金：爆炸科学与技术国家重点实验室基金资助(批准号:ZDKT08-5-4;ZDKT10-01b)

摘　　要：采用动态真空安定性试验（DVST）方法研究了奥克托今（HMX）的热分解过程,利用普适积分法和微分方程法得到了HMX热分解反应的活化能和指前因子。结果表明,不同恒温温度下HMX的热分解机理函数不同。在100~110℃范围内,HMX的热分解过程遵循三维扩散机理的Ginstling-Brounstein方程;在120~140℃范围内,遵循一维扩散机理的抛物线方程;150℃时遵循二维扩散机理的Valensi方程。HMX热分解反应速率常数k随温度的升高而增大,但不符合Van′t Hoff规则。HMX在150℃以下放气量均小于2.0 mL·g-1,表明HMX具有良好的热安定性。对HMX进行高温加速老化试验,以分解深度为0.1%所需时间（tT）与温度（T）的关系数据拟合Semenov方程为：lntT=12157.95/T-19.0052,据此预估25℃下HMX的储存寿命为90.6a。The thermal decomposition process of HMX was studied by dynamic vacuum stability test（DVST） method.The activation energy and pre-exponential constant of thermal decomposition reaction of HMX were obtained by universal integral method and differential method.The results show that the mechanism functions of thermal decomposition reaction of HMX at different isothermal temperatures are different.The thermal decomposition process of HMX obeys Ginstling-Brounshtein equation with 3D mechanism in the temperature range of 100-110 ℃,parabola rule with 1D mechanism in the temperature range of 120-140 ℃ and Valensi equation with 2D mechanism at 150 ℃.Reaction rate constant（k） of the thermal decompositionreaction of HMX increases with temperature,but it does not accord with the Van′t Hoff rule.The amount of decomposition gases of HMX below 150 ℃ obtained by DVST are less than 2.0 mL·g-1,showing that HMX has a good thermal stability.The Semenov equation obtained by the time（t） required to decompose 0.1% HMX at different temperature（T） is lntT=12157.95/T-19.0052.The effective storage life needed to consume 0.1% HMX at 25 ℃ deduced by this equation is 90.6 a.

关 键 词：物理化学 动态真空安定性试验(DVST) 奥克托今(HMX) 动力学参数 机理函数 安定性 储存寿命 

分 类 号：TQ560.1[化学工程—炸药化工]