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基于苯并噁嗪和三官能环氧树脂的共混体系,制备了可用于热熔法制备预浸料的阻燃型基体树脂.考察了树脂体系的软化点、粘性,并对其固化物的阻燃性能、耐热性能及弯曲性能进行了测试.结果表明,通过配方调整,该树脂体系粘性满足热熔法的成型要求,其固化物阻燃性能达到UL-94 V-1,极限氧指数为33,玻璃化转变温度为212℃,弯曲强度达131MPa.通过加入催化剂间苯二酚调节体系的粘度变化,当间苯二酚含量为2wt%时,体系满足预浸料制备复合材料时对粘度变化的要求.该适用于热熔法制备预浸料的阻燃型改性苯并噁嗪树脂可用于航空航天领域.

参考文献

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