利用自制的集“酸源、碳源、气源”于一体的反应性膨胀型阻燃剂EADP制备阻燃聚丙烯(PP),通过红外、锥形量热及扫描电镜法研究了EADP的阻燃机理.结果表明,阻燃PP燃烧时“三源”协同发生化学变化,迅速结炭和释放出NH3 、H2O等不燃性气体,使阻燃PP形成内部多孔、表面致密的炭层,减少了挥发物中可燃气体的比例,突显出凝聚相和气相阻燃机理的作用.与原料PP相比,阻燃PP燃烧参数发生了很大变化,如加入质量分数25％EADP阻燃PP,峰值热释放速率(PHRR)、平均热释放速率(MHRR180)、平均有效燃烧热(av-EHC)、平均比消光面积(av-SEA)、火势增长指数(FIGRA)分别降低了65.50％、70.52％、19.51％、72.30％、82.25％,峰值热释放速率时间(TPHRR)是原料PP的1.9倍,呈现出优良的阻燃、抑烟效果.
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