GAP-TPE热分解动力学研究

Study on thermal decomposition kinetic parameters of GAP-TPE

利用热重(TG)及微商热重(DTG),研究了GAP基含能热塑性弹性体(GAP-TPE)在氩气气氛、不同升温速率的热分解反应过程。根据GAP-TPE热解DTG曲线特点,把GAP-TPE热解过程分为3个阶段,用Kissinger法计算3个阶段的动力学参数,其活化能分别是223、235、57 kJ/mol,lnA分别是52.73、49.39、8.28。用Ozawa法求得各阶段的平均活化能与Kissinger法计算结果基本一致,并采用Coats-Redfen法求算了GAP-TPE热分解3个阶段可能遵循的动力学机理方程式分别为[-ln(1-α)]1/3、-ln(1-α)和-ln(1-α)。

Based on the thermal analysis kinetics,thermogravimetric analysis（TG）and derivative thermogravimetry（DTG）were employed to evaluate the thermal decomposition behaviors of GAP-TPE in Ar atmosphere.A peak separation was performed to separate the thermal decomposition of GAP-TPE into three stages according to the characteristic of the experimental differential mass loss curve,and the kinetic parameters such as activation energy and pre-exponential were calculated and analyzed with Kissinger method.The activation energy of three stages were 223 kJ/mol,235 kJ/mol and 57 kJ/mol,the lnA were 52.73,49.39 and 8.28,respectively.The average activation energy was calculated with Ozawa methods in each decomposition stage is consistent with the result of Kissinger method.In addition,the mechanism functions of the three stage using the methods of Coats-Redfen were[-ln（1-α）]1/3,-ln（1-α）and-ln（1-α）,respectively.