采用环氧端基甲基苯基硅油(EPMPS)对聚苯并噁嗪(PBOZ)树脂进行增韧改性,研究了EPMPS/苯并噁嗪(BOZ)共混树脂的固化行为,考察了EPMPS含量对EPMPS/PBOZ共混树脂力学性能的影响,采用扫描电镜(SEM)观察了其冲击断裂形貌.当EPMPS含量为10％(质量分数)时,EPMPS/PBOZ共混树脂的缺口冲击强度和弯曲强度均达到最大,分别为2.87KJ/m2和146MPa,较纯PBOZ树脂分别提高了46％和33％.进一步采用动态热机械分析仪(DMA)和热重分析仪(TGA)分别研究了EPMPS/PBOZ共混树脂的粘弹性能和热稳定性能,发现EPMPS/PBOZ共混树脂具有较高的耐热性和热稳定性.
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