有机磷改性纳米SiO_2及其在PP中的应用  

Surface Modification of Nano-silica by Organic Phosphorus and Its Application in Polypropylene

作　　者：彭忠利[1] 段先健 黄国书 

机构地区：[1]惠州学院化学工程系,广东惠州516007 [2]广州吉必盛科技实业有限公司,广东广州510663

出　　处：《中国塑料》2016年第2期59-63,共5页China Plastics

基　　金：广东省高校绿色化工与功能材料工程技术开发中心--企业开放课题(201403);惠州学院校立项目(C211.0407);惠州市科技计划项目(惠市科字[2012]148号)

摘　　要：用三氯氧磷和异辛醇对纳米二氧化硅（SiO2）进行表面改性，并采用双螺杆挤出机制备了聚丙烯（PP）／表面改性纳米Si02复合材料。采用傅里叶变换红外光谱仪、差示扫描量热仪、万能材料试验机等研究了表面改性SiO2和复合材料的性能。结果表明，有机磷改性后Si02粒子的表面没有羟基，有机磷的接枝率为1．6％，粒度分布于4～50pm之间，并且有良好的疏水性，复合材料的断面较规整，熔点与PP基本一致；复合材料在失重的各个阶段对应的温度均比PP高7～10℃；改性纳米SiO2能够改善PP复合材料的热稳定性和阻燃性能。Nano-silica was surface modified with phosphorus oxychloride and iso-octyl alcohol, and was introduced into polypropylene（PP） forming composites. The properties of the modified nanosilica and the composite were investigated by Fourier transform infrared spectrometer （FTIR）, differential scanning calorimeter （DSC）, and universal material machine. It was found that the surface of the modified silica had no hydroxyl groups, the grafting degree of organic phosphorus on silica was 1.6 %, its particle size was between 4 and 50 μm, and it had good hydrophobicity. It also showed that the section of the composite was regular, its melting point was basically the same as PP. The corresponding temperatures of the composite in various stages of weight loss were 7- 10 ℃ higher than those of PP. The organic phosphorus modified silica could improve the thermal stability and flame retardant property of PP composite.

关 键 词：聚丙烯 纳米二氧化硅 有机磷 一步改性 性能 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]