摘要
航空高纤维体积含量复合材料树脂传递模塑成型(RTM)工艺要求树脂体系有较低的黏度,因此分别采用双阿累尼乌斯黏度模型和联合工程黏度模型对所配制环氧树脂体系的黏度变化进行预测。结果表明,联合工程黏度模型由于考虑了固化过程中温度变化的累积效应对树脂体系黏度的影响,所以相对于双阿累尼乌斯黏度模型,不管是反应初期还是后期更能准确预测所配制环氧树脂体系黏度的变化。通过联合工程黏度模型确定了该环氧树脂体系的最佳注射温度为35~45℃,该温度范围内树脂的初始黏度大于80mPa·s,且树脂从配制到黏度增加到200m Pa·s的时间大于29min,增加到500mPa·s的时间大于97min,满足航空高纤维体积含量复合材料RTM工艺的充模要求。
The requirement of resin transfer molding(RTM)process for aviation composites with high fiber volume content is that the viscosity of resin system is lower,so the double Arrhenius viscosity models and the combined engineering viscosity models were used to predict the viscosity change of the epoxy resin system.The results show that the combined engineering viscosity model takes into account the cumulative effects of temperature change during resin system curing on the viscosity of the resin system,so compared with the double Arrhenius viscosity model,it is more accurate to predict the change of the viscosity of the epoxy resin system whether it is in the early or late reaction period.The best injection temperature of the epoxy resin system is 35– 45℃.In this temperature range,the initial viscosity of the epoxy resin system is more than 80 mPa·s,and the time from the preparation to the increase of the viscosity to 200 mPa·s is greater than 29 min,and the time to increase the viscosity to 500 mPa·s is greater than 97 min,which meets the filling requirements of RTM process for high fiber volume content composites.
作者
陈鹏群
谢小林
徐迪
Chen Pengqun;Xie Xiaolin;Xu Di(College of Material Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2018年第8期58-62,74,共6页
Engineering Plastics Application
关键词
树脂传递模塑成型
环氧树脂
黏度
流变模型
resin transfer molding process
epoxy resin
viscosity
rheological model
