【摘要】 采用分布活化能模型（DAEM）改进热重实验中高分子材料热解动力学参数分析技术，以此提高教学实验平台的测试能力。通过对比近似积分法（Coats-Redferm）和分布活化能模型计算得到的硬质聚氨酯泡沫热解动力学参数，说明如何通过完善实验技术，获得高分子材料反应活化能的多阶段变化函数。实验结果表明，Coats-Redferm法仅可以得到不同氛围中不同阶段的热解参数值，并且由于热解过程的分段范围受人为因素影响，比较难得到多阶段热解材料的转折温度点。DAEM模型不仅可以获得高分子材料活化能大小，同时可以获得活化能随转化率变化函数，可以具体反映出高分子材料活化能的变化规律。研究结果表明采用分布活化能模型改进热分析技术，可以提高测试平台的分析水平，有助于提升高分子材料科学与工程专业实验教学效果。更多还原

【Abstract】 The distributed activation energy model(DAEM) was adopted to improve the analysis technique of the teaching experimental test platform on polymer material pyrolysis kinetic parameters in thermogravimetric experiments. By comparing the thermolysis kinetic parameters of rigid polyurethane foam calculated by the approximate integration method(Coats-Redferm) and the distributed activation energy model, it shows how to obtain the multi-stage variation function of the activation energy of the reaction of polymer materials by perfecting the experimental technique. The experimental results show that the Coats-Redferm method can only obtain the values of the pyrolysis parameters in different atmospheres and at different stages. But it is difficult for the CoatsRedferm method to obtain the switching temperature point of the multi-stage pyrolysis material because the segmentation range of the pyrolysis process is determined artificially. The DAEM model can not only obtain the activation energy value of the polymer material,but also obtain the function of activation energy with conversion rate, which can show the law of polymer materials activation energy in the process of pyrolysis. The research results show that distributed activation energy model can be utilized to improve the thermal analytical capabilities of the teaching experimental test platform and help to enhance the experimental teaching level of polymer material science and engineering majors.更多还原