注胶修复工艺的耐高温环氧树脂体系工艺性能

Processing properties of heat resistant epoxy resin systems for injection repairing

针对注胶修复工艺要求,采用差示扫描量热法热分析和流变仪测试三种中温固化配方的耐高温缩水甘油胺型环氧树脂体系的固化特性和化学流变特性,通过对比分析三种配方树脂体系的固化条件和黏度特性,确定MF-4101/ZH110/DMP-30树脂体系为最适宜注胶修复工艺的配方。建立该树脂体系在等温条件下黏度特性曲线的Daul Arrhenius模型和高阶指数拟合模型。结果表明,高阶指数拟合模型的预测精度和适用范围均优于Daul Arrhenius模型,预测黏度与实验结果具有良好的一致性,根据高阶指数拟合模型建立的黏度随温度、时间变化的唯象关系式,可以准确地预报修复树脂体系的工艺窗口。

The curing properties and chemorheological behaviors of the three heat resistant glyceramine epoxy resin systems for the injection repairing were measured by the isothermal differential scanning calorimetry and the rotational rheometer to investigate the curing cycle and the chemorheologieal characteristics of the resin systems. The MF - 4101/ZHll0/DMP - 30 resin systems were proved to be the most suitable formulation for injection repairing by comparing the curing conditions and viscosities of the three resin systems. The Danl Arrhenius model and the high-order exponential fitting model were established to analyze the isothermal viscosity-time curves of the resin system. Results show that the accuracy and the applicability of the high-order exponential fitting model for viscosity predicting are superior to the Daul Arrhenius model. The predicted results of the high-order exponential fitting model are in good agreement with the experimental data. This phenomenologieal formula based on the above model can be used to predict the processing windows of injection repairing resin systems.