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采用流变仪测试耐高温缩水甘油胺型环氧树脂体系的黏度-温度和黏度-时间特性曲线,考察了树脂体系的化学流变特性,建立并对比树脂体系在等温条件下黏度特性曲线的Daul Arrhenius模型和工程黏度模型,提出了一种二阶指数黏度模型预测体系的黏度变化规律。结果表明:二阶指数黏度模型的预测精度和适用范围均优于Daul Arrhenius模型和工程黏度模型,预测黏度与实验值具有良好的一致性,根据建立的黏度随温度和时间变化的唯象关系式,可方便准确地预报树脂体系的工艺窗口,指出了其在工程应用中必须改善的工艺问题。
The viscosity-temperature and viscosity-time curves of the high-temperature glycidyl amine-based epoxy resin were tested with a rheometer. The chemical rheological properties of the resin system were investigated. The viscosity of the resin system under isothermal conditions was established and compared with Daul Arrhenius model and engineering viscosity model, a second-order exponential viscosity model is proposed to predict the viscosity change of the system. The results show that the prediction accuracy and application range of the second-order exponential viscosity model are better than the Daul Arrhenius model and the engineering viscosity model. The predicted viscosity is in good agreement with the experimental data. Based on the phenomenological relationship of the viscosity with time and temperature , The process window of the resin system can be predicted easily and accurately, and the process problems that must be improved in the engineering application are pointed out.