超支化聚酯改性环氧-酸酐浇注树脂及性能研究

Performance of epoxy resin-anhydride pouring materials modified with hyperbranched polyester

采用端羟基超支化聚酯、环氧树脂、甲基四氢苯酐和活性硅微粉为主要材料制备了高性能环氧浇注树脂。研究了超支化聚酯对体系黏度、沉降性、耐温指数、机械性能和电性能的影响及其规律。结果表明,超支化聚酯可有效分散硅微粉,提高混合体系的均匀度,提高浇筑树脂的耐热性、机械强度和电性能。

The epoxy pouring resin was prepared by using the hydroxyl-terminated hyperbranched polyester, epoxy resin, methyl tetrahydrophthalic anhydride and silica powder as the main materials. The effects of hyperbranched polyester as the addictive on the viscosity, settleability, heat-resistance, mechanical and electrical properties of the cured pouring resin were in detail studied. The results showed that hyperbranched polyester not only increased the heat-resistance, mechanical and electrical properties of the cured pouring resin, but also effectively dispersed the silica powder into the pouring resin and improved the evenness of the mixing system.