自然老化对膨胀阻燃LGFPP复合材料燃烧性能的影响  

Effect of Natural Aging on Combustion Performance of Intumescent Flame Retarded LGFPP Composites

作　　者：王蒙[1] 宋海硕 周登风 郭建兵[1,2] Wang Meng;Song Haishuo;Zhou Dengfeng;Guo Jianbing(College of Materials Science and Metallurgy Engineering, Guizhou University, Guiyang 550025, China;National Engineering Research Center for Compounding and Modification of Polymeric Materials, Guiyang 550014, China)

机构地区：[1]贵州大学材料与冶金学院,贵阳550025 [2]国家复合改性聚合物材料工程技术研究中心,贵阳550014

出　　处：《工程塑料应用》2016年第11期92-95,共4页Engineering Plastics Application

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)

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。The intumescent flame retardant (IFR) of long glass fiber reinforced polypropylene (PP) composites were prepared by melt blending method,and the effects of different natural aging time on combustion properties of the composites under natural conditions were investigated by limiting oxygen index,UL 94 and cone calorimeter tests. The results show that the PP resin and IFR will degrade in the natural aging process,which leads to the combustion performance of the samples decreased after a long time,but the migration effect of flame retardant is still dominant in the early stage of aging. When the aging time is 6 months,the limit oxygen index of the sample reaches the maximum value of 28.2% while the peak of heat release rate,total heat release and smoke production release rate have the minimum value,which indicates the flame retardant property of the composites was improved. SEM test results show the density of carbon residue formed in combustion process is a key factor affecting the combustion performance of the composites.

关 键 词：自然老化 长玻纤 聚丙烯 膨胀阻燃剂 阻燃性能 残炭形貌 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]