采用聚磷酸铵(APP)阻燃处理酚醛树脂,并与阻燃处理过的苎麻织物复合制备酚醛树脂层压板.结果发现APP处理后的层压板的极限氧指数得到极大的提高,加入1wt％的APP即可使极限氧指数由39.1提高到52.5.锥形量热实验发现这种层压板的残炭量增加,点燃时间延长,峰值热释放速率下降.但是APP的加入使层压板的力学性能有一定程度的下降.
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