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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)。
The thermal decomposition reaction of GAP-based thermoplastic elastomers (GAP-TPE) under argon atmosphere and different heating rates was studied by TG and DTG. According to the characteristics of GAP-TPE pyrolysis DTG curve, the pyrolysis process of GAP-TPE is divided into three stages. The kinetic parameters of three stages of GAP-TPE are calculated by Kissinger method. The activation energies are 223,235 and 57 kJ / mol, Respectively 52.73,49.39,8.28. The average activation energy calculated by Ozawa method is basically the same as that of Kissinger method. The kinetic mechanism equations that can be followed in the three stages of thermal decomposition of GAP-TPE by Coats-Redfen method are respectively as follows: [-ln (1 -α)] 1/3, -ln (1-α) and -ln (1-α).