Copolymerized poly(m-phenylene isophthalamide) (co-PMIA) was synthesized by solution polycondensation using m-phenylenediamine and isophthaloyl dichloride and 3,4′-oxydianiline (3,4′-ODA). This paper described the preparation and characterization of the copolymers from various contents 3,4′-ODA to afford co-PMIA with ideal high molecular mass. The copolymer showed excellent thermal stability with the glass transition temperature of 267 °C and the onset decomposition temperature (5% mass loss) of 445 °C. The thermal degradation of co-PMIA was measured with various thermal analytical techniques; the pyrolysis products were obtained and analyzed under air atmosphere. The possible thermal decomposition mechanism of co-PMIA was discussed. The present pyrolysis was investigated using TG under air atmosphere at four different heating rates (5–20 °C min⁻¹). Three different kinetic methods, the iso-conversional Ozawa–Flynn–Wall and Kissinger and Crane methods were applied on TG data of co-PMIA to calculate the kinetic parameters including activation energy, pre-exponential factor and reaction order.

中文翻译：

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空气热解共聚PMIA与醚部分的动力学研究

通过使用间苯二胺和间苯二甲酰二氯和3,4'-氧二苯胺（3,4'-ODA）进行溶液缩聚来合成共聚的聚（间亚苯基间苯二甲酰胺）（co-PMIA）。本文介绍了各种含量的3,4'-ODA共聚物的制备和表征，以提供具有理想高分子量的co-PMIA。该共聚物在267°C的玻璃化转变温度和445°C的起始分解温度（5％质量损失）下表现出出色的热稳定性。使用多种热分析技术测量了co-PMIA的热降解；获得热解产物并在空气气氛下进行分析。讨论了共-PMIA可能的热分解机理。使用热重法在空气气氛下以四种不同的加热速率（5–20°C分钟^-1）。将三种不同的动力学方法（等转化Ozawa–Flynn–Wall和Kissinger和Crane方法）应用于co-PMIA的TG数据，以计算动力学参数，包括活化能，预指数因子和反应阶数。