刚性聚芳醚腈热分解动力学研究

KINETIC STUDIES ON THERMAL DEGRADATION OF THE RIGID-RIGID POLY(CYANOARYLETHER)

利用 TG、DTG方法研究了聚芳醚腈在 N2 气氛中不同升温速率 β时的热降解过程和动力学。实验发现 ,随着β的增大 ,其降解温度呈线性升高 ,与在空气中的热降解比较 ,降解率和降解温度均提高。同时 ,我们利用 Freeman-carroll法进行了动力学处理 ,确定聚芳醚腈在 N2 气氛中的热分解过程为一步反应 ,是一级反应 ,反应活化能为2 1 0 .8k J/ mol。

At deferent heating rates( β ), the thermal degradation process of [poly(cyanoarylether)PCE] is one step reaction in N 2 through TG, DTG. The degradation temperatures rise linearly with the increasing of the β . The degradation degree and the degradation temperature in N 2 are higher than those in air. The parameters of thermal degradation kinetics of the PCE have been obtained by Freeman carroll method, and have been compared with kissinger peak maximum, the apparent reaction order of the PCE in N 2 is 1, the activation energe is 210.8 kJ/mol.