Abstract Due to their outstanding properties, phthalonitrile based polymers plays an important role in high performance advanced materials evaluated depending upon their curing process and mechanism. Henceforth it is necessary to understand the curing kinetics of bisphthalonitrile monomer having imide linkage using 4, 4’-diaminodiphenylsulfone (DDS) as curing agent for further investigations. Thus, curing kinetics was investigated by recording non-isothermal differential scanning calorimetric (DSC) scans at heating rates of 5 °C, 10 °C, 15 °C and 20 °C/min. Activation energy for bisphthalonitrile/4, 4’-diaminodiphenylsulfone (DDS) system was calculated using Starink method and results give a substantial evidence that Arrhenius activation energy (Ea) are certainly dependent on the structure of monomer and curing agent. The cured FIPN/DDS, ODPA-PN/ DDS systems show comparable high thermal stability and elevated glass transition temperature as compared to Bis-ADPN/ DDS composition. Subsequently, this composition exhibits comparative heat resistance and improved moisture resistance.

中文翻译：

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芳香胺固化含酰亚胺邻苯二甲腈树脂的动力学和热性能

摘要 邻苯二甲腈基聚合物由于其优异的性能，在根据其固化过程和机理进行评估的高性能先进材料中发挥着重要作用。今后有必要了解具有酰亚胺键的双邻苯二甲腈单体使用 4, 4'-二氨基二苯砜 (DDS) 作为固化剂的固化动力学以进行进一步研究。因此，通过在 5 °C、10 °C、15 °C 和 20 °C/min 的加热速率下记录非等温差示扫描量热 (DSC) 扫描来研究固化动力学。使用 Starink 方法计算了双邻苯二甲腈/4, 4'-二氨基二苯砜 (DDS) 体系的活化能，结果提供了大量证据，表明 Arrhenius 活化能 (Ea) 肯定取决于单体和固化剂的结构。固化的 FIPN/DDS，与 Bis-ADPN/DDS 组合物相比，ODPA-PN/DDS 系统显示出相当高的热稳定性和较高的玻璃化转变温度。随后，该组合物表现出相当的耐热性和改进的耐湿性。