累托石/膨胀型阻燃剂协同阻燃聚丙烯的研究  

Study on Synergistic Retarding Effect of Rectorite and Intumescent Flame Retardant on Polypropylene

作　　者：刘辉[1] 卢忠远[1] 康明[1] 宋丽贤[1] 杨凯[1] 

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010

出　　处：《中国塑料》2009年第10期68-72,共5页China Plastics

基　　金：国家高技术研究发展计划(863计划)资助项目(2003AA333030)

摘　　要：以硝酸为酸化剂,氯化钠为钠化剂,十六烷基三甲基溴化铵(HDTMA.Br)为插层剂,采用"酸化-钠化-插层"工艺制备了有机累托石(OREC)。并采用熔融插层法制备了聚丙烯(PP)/膨胀型阻燃剂(IFR)/OREC阻燃复合材料。探讨了OREC对PP阻燃复合材料的影响,通过X射线衍射、极限氧指数、热重分析、扫描电子显微镜对阻燃复合材料的微观结构、阻燃性、热稳定性及成炭情况进行了研究。结果表明:PP高分子链插层进入有机累托石层间,形成了插层型复合材料。OREC与IFR具有明显的协同阻燃性。OREC添加量为2%时,复合材料的极限氧指数达到31%,较单独添加IFR时高出4.8%;与纯PP相比,复合材料残炭率由6%提高到22%。SEM分析表明复合材料的成炭性较好。Acid treated with HNO3, ion-exchanged with NaC1, and intercalated with hexadecyhrimethylammonium bromide （HDTMA · Br）, organic rectorite （OREC） was prepared and used in polypropylene （PP）/intumescent flame retardant （IFR） composites. The synergistic flame retarding effect of OREC and IFR was investigated. The composite was characterized using XRD, LOI, TG, and SEM. It was found that the layers of organic rectorite were delaminated by PP chains. There was a clear synergistic effect between OREC and IFR. When 22% of OREC was introduced, the LOI increased by 4. 8 %, and the carbon residue increased to 22 %.

关 键 词：聚丙烯 累托石 插层 协同阻燃 膨胀型阻燃剂 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]