表面改性剂对聚丙烯／氢氧化镁复合材料燃烧性能和热稳定性及结晶行为的影响  

Effect of Surface Modification on Flammability,Thermal Stability and Crystallization Behaviors of PP/Mg(OH)_2 Composites

作　　者：陈晓浪[1,2] 于杰 何敏[3] 郭少云[4] 鲁圣军[2,3] 胡智 周祚万[1] 

机构地区：[1]材料先进技术教育部重点实验室,西南交通大学材料科学与工程学院,四川成都610031 [2]国家复合改性聚合物材料工程技术中心,贵州贵阳550014 [3]贵州大学冶金与材料工程学院,贵州贵阳550003 [4]高分子材料工程国家重点实验室,四川大学高分子研究所,四川成都610065

出　　处：《高分子材料科学与工程》2009年第5期60-63,共4页Polymer Materials Science & Engineering

基　　金：贵州省科学技术基金项目(黔科合计省[2008]7001);西南交通大学青年教师科研起步项目(2007Q009);国家863计划项目(2003AA32X230);国家科技支撑计划资助(2007BAB08B05)

摘　　要：研究了硅油对聚丙烯(PP)/氢氧化镁(MH)复合材料性能的影响。通过极限氧指数(LOI)、热失重分析仪(TGA)、差示扫描量热仪(DSC)和偏光显微镜(POM)对PP及阻燃PP的性能进行了研究。结果表明,阻燃PP比纯PP有较高的残留量,热稳定性得到改善。其LOI达到难燃塑料的要求,有良好的阻燃性。未经改性的MH对PP基体有异相成核作用,使结晶峰温度向高温方向偏移,而硅油削弱填料对PP基体的异相成核作用。POM分析表明,MH粒子在基体中的分散性对PP的晶粒形貌和尺寸起着十分重要的作用。Magnesium hydroxide （MH）, which was modified by silicon oil, was filled into polypropylene as a fire retardant. Comparison was made with untreated and treated PP/MH composites. The effects of modification agent on the flammability, the crystallization and thermal stability of PP/MH composites were studied by limiting oxygen index （LOI）, thermogravimetric analysis （TGA）, differential scanning calorimetry （DSC） and polarizing optical microscope （POM）, respectively. The results show that addition of Mg（OH）2 can improve flame retardancy of PP/ MH composites. TGA shows that the thermal oxide stability of flame retardant PP composites is much better than thatof neat-PP. DSC data indicates that Mg（OH）2 has heterogeneous nucleant effect on PP matrix and makes crystallization summit temperature increase. However, surface modifier can weaken heterogeneous nucleation of PP/ MH flame retardant composites. POM results show that the dispersed morphology of MH plays an important role in the crystalline morphology and spherulite size of PP crystals.

关 键 词：聚丙烯 氢氧化镁 阻燃 热稳定性 结晶 

分 类 号：TQ314.246[化学工程—高聚物工业]