摘要
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 copolymer were studied by dynamic viscosity and isothermal viscosity tests.A chemrheological model based on Dual-Arrhenius equation was established and the viscosity and process conditions of the copolymers were predicated.The results showed that the relative viscosity characteristics of copolymers were accorded with Dual-Arrhenius equation at 60-160 ℃.The copolymerization was slow below 60 ℃.The initial viscosity of the system was higher and decreased with the increasing of temperature but increased sharply at about 170 ℃.The visctsity was increased with the increasing of time.The ideal pressure time was after holding the temperature at 125 ℃ for 30 min.
出处
《热固性树脂》
CAS
CSCD
北大核心
2010年第5期4-7,共4页
Thermosetting Resin
