耐高温缩水甘油胺型环氧树脂的化学流变特性  

Chemorheological characteristics of high-temperature resistant glycidylamine epoxy

作　　者：吴海[1] 肖加余[1] 邢素丽[1] 杨金水[1] 杨孚标[1] 

机构地区：[1]国防科学技术大学航天科学与工程学院,长沙410073

出　　处：《复合材料学报》2016年第4期741-748,共8页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(51303208;51403235)

摘　　要：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 characteristic curves of high-temperature resistant glycidylamine epoxy system were measured by the rotational rheometer to investigate the chemorheological characteristics of the resin system.Daul Arrhenius model and engineering viscosity model were established compared with each other to analyze the isothermal viscosity characteristic curves of the resin system.Then a second-order exponential viscosity model was proposed to predict the viscosity change law of the resin system.The results show that the prediction accuracy and applicability of the second-order exponential viscosity model are better than Daul Arrhenius model and engineering viscosity model.The predicted viscosity is in a good agreement with the experimental data.This phenomenological formula of viscosity versus temperature and time can be used to predict the processing window of the resin system conveniently and accurately,and point out the technology problems in the engineering applications.

关 键 词：耐高温 环氧树脂 化学流变模型 黏度 工艺窗口 

分 类 号：TB332[一般工业技术—材料科学与工程]