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采用二烯丙基双酚A(DP)与乙烯基橡胶对两种结构类型双马树脂进行增韧。探讨了乙烯基橡胶用量对改性树脂的力学性能、耐热性能及玻璃化转变温度的影响,确定当乙烯基橡胶用量为5%(占双马树脂)时,改性树脂具有较好的综合性能,较未增韧前有大幅提高。此时,冲击强度为23.17kJ/m2,GIC值为338.5J·m-2,玻璃化转变温度为241℃,5%热失重温度约在420℃。同时,通过SEM观察其断面的微观形貌为典型的韧性破坏。
Diallyl bisphenol A (DP) and vinyl rubber were used to toughen the two structural types of bismaleimide resin. The effect of the amount of vinyl rubber on the mechanical properties, heat resistance and glass transition temperature of the modified resin was discussed. The results showed that the modified resin had a better overall performance when the content of vinyl rubber was 5% Performance, not toughened before a substantial increase. At this time, the impact strength was 23.17 kJ / m2, the GIC value was 338.5 J · m-2, the glass transition temperature was 241 ° C, and the 5% weight loss temperature was about 420 ° C. At the same time, the microstructure of the section was observed by SEM as a typical ductile failure.