【摘要】 用热重法(TG)研究了聚芳醚醚酮(PEEK)和磺化改性的聚芳醚醚酮(S-PEEK)的热分解动力学,计算了热分解动力学参数,结果表明PEEK及S-PEEK的热分解符合无规引发裂解模型。进一步考察了磺化对PEEK热分解的影响,结合温度程序裂解色谱-质谱结果,探讨了S-PEEK的TG曲线上呈现二个失重台阶的意义。更多还原

【Abstract】 The kinetics of thermal degradation of poly (aryl ether ether ketone) and sulfonated PEEK was studied by isothermal and dynamic thermogravimetry. The results calculated from the kinetic models based on random initiation followed by rapid disproportionation and termination were in good agreement with the experimental data. The overall activation energy for the degradation was found to be 235 KJ/mol. The effect of sulfonatiorr on thermal degradation was also mentioned. It is noted there are two weight loss steps in the dynamic TG curves for S-PEEK. Compared with the temperature programing PGC-MS data, the thermal degradation behaviour of S-PEEK was discussed here.更多还原