尼龙69的热降解动力学研究

Study on kinetics of thermal degradation of nylon 69

用热重分析法研究了尼龙69在N2气氛中不同升温速率(β)下的热降解反应动力学.尼龙69在N2中的降解反应过程为一步反应,降解温度随β的升高线性升高.用Kissinger法、Flynn-Wall-Ozawa法和Coats-Redfern法求得降解反应的活化能分别为242.9,244.0,249.9kJ/mol,表观指前因子平均值为1015.52.用Coats-Redfern法证明了尼龙69的热降解反应为相边界反应.

This paper studied the kinetics rates（β） in N2 atmosphere by thermograv of nylon 69 was one step reaction in N2 increasing of the ft. Kissinger, Flynn- of thermal degradation of lmetrlc and the -Wall-O respectively to determine the apparent activation analysis（TG）. degradation t zawa and Co energy of the and 242.9, 244.0, 249.9 kJ/mol were obtained fro value of the apparent pre-exponential factor was 10^15.52 confirmed as contracting surface reaction by Coats-R nylon 69 at different heating e thermal degradation process emperature rose linearly with the ats-Redfern methods were used thermal degradation of nylon 69, those methods respectively. The average The thermal degradation mechanism was edfern method.