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基于DSC数据,采用以Vyazovkin积分法为基础的升温法非模型动力学和等温法非模型动力学对双酚A型环氧树脂E51/4,4′-二氨基二苯基砜(DDS)体系及多官能度环氧树脂AG80/DDS体系的固化过程进行了研究,并结合玻璃化转变温度的变化和原位红外测试技术,对比分析了升温与等温条件下的固化反应规律.结果表明,与传统的模型拟合法相比,非模型动力学更适合定量预测树脂固化反应过程,并能为固化过程中反应机理变化的研究提供重要依据;等温法非模型动力学能够更好地预测两种树脂体系在不同恒温条件下的固化反应历程,并且升温法与等温法非模型动力学所得到的反应活化能-固化度之间的变化关系不同,表明不同温度条件下树脂的反应机理不同,这与升温和恒温条件下玻璃化效应及环氧官能团的变化规律相吻合.
Based on the DSC data, the bisphenol A epoxy resin E51 / 4,4’-diaminodiphenylsulfone (DDS) system was modified by non-model kinetic and isothermal method based on Vyazovkin integral method And curing process of multi-functional epoxy resin AG80 / DDS system were studied.Combining with the changes of glass transition temperature and in-situ infrared measurement technology, the curing reaction rules under heating and isothermal conditions were compared.The results show that Compared with the traditional model fitting method, non-model kinetics is more suitable for the quantitative prediction of resin curing reaction process, and can provide an important basis for the study of the reaction mechanism changes in the curing process; isothermal non-model kinetics can better predict the two resins The results show that the reaction mechanism of resin under different temperature conditions is different from that of reaction under different temperature conditions, Glass transition temperature and heating conditions and the variation of epoxy functional groups coincide.