RFI工艺用环氧基树脂膜的研制

Development of epoxy matrix resin film used in RFI

据RFI工艺用环氧树脂基树脂膜低温成膜性、高温流动性和浸渗性的技术性能要求,设计了在一定温度内具有低反应活性的GY6010型高粘度液态双酚A二缩水甘油醚环氧树脂、HT907型六氢邻苯二甲酸酐和DY062型苄基二甲胺树脂膜制备体系。根据等当量反应计算理论和浇注体的力学性能,确定了树脂膜制备体系的最佳混合比例,利用加热聚合、流延成膜和快速冷却方法,制备了具有低固化度的BS-1型环氧树脂基树脂膜。经测试该树脂膜成膜性、弯曲性良好;在80℃的融渗温度下粘度为645 mPa.s,低粘度区域宽度(粘度小于1 000 mPa.s)达25 m in,凝胶时间达56 m in。采用该树脂膜制备的RFI叠层板试件空隙含量(0.8%)极低,与模压试件相比,RFI试件拉伸强度、弯曲强度和层间剪切强度分别提高4.57%、6.26%和21.88%。

According to the requirements of low-temperature film forming property, high-temperature flowing property and impregnation property of epoxy matrix resin film used in RFI, a set of resin film preparation system which consists of GY6010 bisphenol A epoxy resin with high viscosity, HT907 HHPA and DY062 BDMA was designed. The optimum mix proportion was determined on the basis of equivalent reaction theory and mechanical performance of casting piece. BS-1 type epoxy matrix resin film with low cure degree was prepared by heating polymerization, flowing film-forming and fast cooling methods. The test results show that film forming property and flexibility of the resin film at room temperature are good. Its viscosity is 645 mPa , s at 80 ℃. The width of low viscosity （viscosity is less than 1 000 mPa · s） is up to 25 min, and gel time reaches 56 min. The void content of RFI laminated composites made by BS-1 resin film is only 0.8%. Compared with compression molding specimen, the tensile strength, bending strength and intedaminar shear strength of RFI specimen can be improved by 4.57%, 6.26% and 21.88% respectively.