通过极限氧指数(LOI)、水平垂直燃烧(UL-94)、锥形量热(cone)等方法,研究了纳米氢氧化镁(MH)添加到六(4-DOPO羟甲基苯甲酸)环三磷腈化合物(FR)、聚磷酸铵(APP)和环氧树脂(EP)后,制备的新型复合阻燃材料(FR/APP/MH/EP)的阻燃及力学性能.结果表明:在固定FR/APP比例为1/1的前提下,添加1%(质量分数)的MH时,复合阻燃材料EP2 (10% FR/10% APP/1% MH/EP)的LOI值达到36.4%,其热释放速率(pk-HRR)、有效燃烧热平均值(av-EHC)、比消光面积平均值(av-SEA)、一氧化碳释放率平均值(av-CO)较纯环氧树脂(EP0)分别下降了79.8%,6.73%,47.2%,33.3%,相对于EP1(10% FR/10% APP/EP)分别下降了20.0%,69.6%,83.6%,58.6%,同时EP2的拉伸、弯曲、冲击强度较EP1也分别提高了47.6%,75.2%,196%;SEM分析表明EP2燃烧后能够形成一层均匀、致密、连续的炭层,具有良好的阻燃、抑烟、降毒效果.
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