采用多聚磷酸蜜胺(MPP)和笼状季戊四醇磷酸酯(PEPA)复配成膨胀型阻燃剂,氧化镧(La2O3)为阻燃协效剂,制备了阻燃性能良好的膨胀型阻燃聚丙烯复合材料(PP/IFR).研究了La2O3用量对PP/IFR体系阻燃性能的影响及阻燃协同作用机理.结果表明,添加少量的La2O3可显著提高PP的阻燃性能；当La2O3质量分数为1％时,PP/IFR的氧指数高达31.0％.热重分析(TGA)、红外光谱(FT-IR)、激光拉曼光谱(LRS)分析和电子扫描显微镜(SEM)观测结果表明,添加La2O3能促进残炭转化为聚芳烃结构,形成更多的结晶碳,提高炭层的强度,并催化IFR的酯化交联反应,形成更多的P-O-P和P-O-C交联网络结构.
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