自然老化对膨胀阻燃LGFPP复合材料燃烧性能的影响

发布时间：2018-09-02 10:11

【摘要】：通过熔融共混法制备出膨胀阻燃长玻纤增强聚丙烯(LGFPP/IFR)复合材料,利用极限氧指数(LOI)测试、垂直燃烧测试、锥形量热分析等表征手段研究了户外自然条件下,不同自然老化时间对LGFPP/IFR复合材料燃烧性能的影响。结果显示,在LGFPP/IFR复合材料的自然老化过程中,PP基体及IFR会发生降解,导致长时间老化后试样的燃烧性能下降,但在老化初期阻燃剂的迁移效应依然占主导地位。当老化时间为6个月时,试样的LOI达到最大值,为28.2%,其热释放速率峰值、总热释放量以及生烟速率均为最小值,表明复合体系的阻燃性能有所提高。扫描电子显微镜测试结果表明,试样燃烧后形成炭层的致密性是影响复合体系燃烧性能的关键因素。
[Abstract]:Intumescent flame retardant long glass fiber reinforced polypropylene (LGFPP/IFR) composites were prepared by melt blending method. The outdoor natural conditions were studied by means of limiting oxygen index (LOI), vertical combustion and cone calorimetry. Effects of different natural aging time on the combustion properties of LGFPP/IFR composites. The results show that the degradation of PP matrix and IFR during natural aging of LGFPP/IFR composites leads to the degradation of the combustion properties of the composites after long aging, but the migration effect of flame retardants still dominates in the early aging period. When the aging time is 6 months, the LOI of the sample reaches the maximum value, which is 28.2.The peak value of heat release rate, total heat release and smoke generation rate are the minimum, which indicates that the flame retardant property of the composite system has been improved. The results of scanning electron microscopy (SEM) show that the compactness of the carbon layer formed after combustion is the key factor affecting the combustion performance of the composite system.
【作者单位】：贵州大学材料与冶金学院;国家复合改性聚合物材料工程技术研究中心;
【基金】：贵州省高层次创新型人才培养项目(黔科合人才[2015]4039号) 贵州省优秀青年科技人才培养对象项目(黔科合人字[2015]26号) 贵州省科技计划项目(黔科合重大专项字[2015]6005号,黔科合成果[2016]4524号)
【分类号】：TB332

【相似文献】