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针对RTM成型工艺对基体树脂的特殊要求,结合MA型苯并噁嗪树脂耐烧蚀、高性能的特点,对制造高强度苯并噁嗪树脂基碳纤维复合材料进行了研究。系统考察了基体树脂体系的工艺性能、固化反应行为以及力学性能。结果表明:该树脂体系在95～115℃温度区间内至少有350min的低黏度(≤500mPa.s)时间作为工艺开放期,符合RTM成型工艺要求;树脂体系的玻璃化转变温度在223℃;RTM苯并噁嗪树脂基碳纤维复合材料的空隙含量仅为0.23%,树脂浇铸体和碳纤维复合材料的常规力学性能优异。MA型苯并噁嗪树脂完全可以采用RTM工艺成型高性能复合材料。
According to the special requirements of matrix resin for RTM molding process and the ablation resistance and high performance of MA benzoxazine resin, the production of high strength benzoxazine resin-based carbon fiber composites was studied. The system investigated the process of matrix resin system performance, curing reaction behavior and mechanical properties. The results show that the resin system has a low viscosity (≤500mPa.s) for at least 350min in the temperature range of 95-115 ℃ as the process opening time, which meets the requirement of RTM molding process. The glass transition temperature of the resin system is 223 ℃. The RTM The void content of benzoxazine resin-based carbon fiber composites is only 0.23%, and the resin and carbon fiber composites have excellent mechanical properties. MA benzoxazine resin RTM process can be fully used to shape high-performance composite materials.