UHMWPE纤维/碳纤维复合材料用改性环氧树脂的制备及性能

摘要

用甲基丙烯酸改性环氧树脂E-51制备了UHMWPE纤维/碳纤维复合材料用基体树脂,主要研究了反应时间和催化剂用量对改性环氧树脂及复合材料性能的影响。结果表明,当甲基丙烯酸与环氧树脂摩尔比为1.1∶1.0、催化剂二乙基胺用量为0.35%（质量分数）、反应温度为110℃时,改性反应6h所得改性环氧树脂与UHMWPE纤维/碳纤维的复合材料的性能较好。用FTIR、DMA、SEM对改性环氧树脂及复合材料的结构和性能进行了表征,甲基丙烯酸改性环氧树脂对UHMWPE和碳纤维具有较好的粘接性。%The matrix resin of UHMWPE fibers/carbon fibers composites was prepared by modified epoxy resin E-51 with methyl acrylic acid（MA）.The effects of reaction time and catalyst amount on properties of modified epoxy resin and composites were investigated.The results showed that the modified epoxy resin and its UHMWPE/carbon fibers reinforced composite displayed excellent properties when molar ratio of MA and epoxy group is 1.1∶1.0 and the modification reaction was carried out at 110℃ for 7h using 35wt% diethylaniline as catalyst.The structure and properties of the modified epoxy resin and composite were characterized by FT-IR,dynamic mechanical analysis（DMA） and SEM.The research show modified epoxy resin has stronger adhesive force for UHMWPE and carbon fiber.The thermal and mechanical properties have improved obviously through using the modified epoxy resin as matrix of UHMWPE fiber/carbon fiber composite.