肼混合物胶体推进剂的热分解特性研究

A Study of Thermal Decomposition Characteristic of Hydrazine Compounds Gel Propellant

为了评估肼混合物胶体推进剂的热安全性,采用差示扫描量热仪(DSC)和绝热加速量热仪(ARC),对肼混合物胶体推进剂的热分解特性进行了研究。DSC的实验结果表明,在2,5,10和20K·min-1四种升温速率下推进剂的初始热分解温度分别为185.73,227.20,230.37和245.19℃;根据DSC的试验结果,利用Kissinger法计算得到热分解活化能为181.80k J·mol-1。在ARC实验中,肼混合物胶体推进剂在理想绝热条件下的初始分解温度为180.58℃,最大温升速率达到0.6237°C·min-1,绝热温升为227.92℃,最高温度为408.50℃,计算得到其热分解活化能为121.77k J·mol-1。比较DSC与ARC的试验结果,两者基本一致;热分析试验中推进剂先经历相变吸热过程,再进行分解放热。

In order to evaluate the thermal safety of hydrazine compounds gel propellant,its thermal decomposition characteristics were studied by Differential Scanning Calorimetry（DSC） and Accelerating Rate Calorimeter（ARC）. The onset decomposition temperature of propellant are 185.73, 227.20, 230.37 and245.19℃ in different heating rate of 2,5,10 and 20K·min-1,respectively in DSC test and the activation energy of the gel propellant is 181.80 k J·mol-1according to Kissinger method. Whilst in ARC test,in the ideal adiabatic environment, the onset decomposition temperature is 180.58℃, the maximum temperature rise rate is0.6237℃·min-1,the adiabatic temperature rise is 227.92℃,the maximum temperature is 408.50℃ and the calculated result of activation energy is 121.77 k J·mol-1. They are basically the same. Results indicate that the phase transition with endothermic happened firstly and then followed by decomposition with exothermic in heating process of hydrazine compounds gel propellant.