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通过动态粘度和等温粘度测试研究了AFG-90环氧树脂/氰酸酯共聚物体系的流变特性,根据双阿累尼乌斯方程建立了环氧树脂/氰酸酯共聚物的化学流变模型,并对共聚物的粘度和工艺条件进行了预测。结果表明:60～160℃时共聚物体系的相对粘度特性符合双阿累尼乌斯粘度方程;低于60℃时体系共聚反应迟缓,初始粘度较高;随着温度升高,树脂初始粘度下降,在170℃附近粘度急剧上升,粘度随时间延长增加,理想的加压时机是温度升至125℃后保温30min。
The rheological properties of AFG-90 epoxy resin / cyanate ester copolymer system were studied by dynamic viscosity and isothermal viscosity tests. The chemical rheology of epoxy resin / cyanate copolymer was established according to the double Arrhenius equation Model, and the viscosity of the copolymer and the process conditions were predicted. The results show that the relative viscosity of the copolymer system accords with the double Arrhenius viscosity equation at 60 ~ 160 ℃. When the temperature is below 60 ℃, the copolymerization reaction is slow and the initial viscosity is high. With the increase of temperature, the initial viscosity of the resin decreases , A sharp rise in viscosity near 170 ℃, the viscosity increases with time, the ideal timing of the pressure is raised to 125 ℃ after the temperature was incubated for 30min.