纳米CaCO3复合微粒的制备以及在PVC塑料中的应用

将甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)双单体在纳米碳酸钙粒子存在下的水相悬浮液中进行无皂乳液聚合,制备纳米碳酸钙聚合物复合微粒,研究了纳米碳酸钙复合微粒的加入对PVC复合材料结构形态与性能的影响,用透射电子显微镜(TEM)以及扫描电子显微镜(SEM)观察了纳米CaCO3复合微粒/PVC复合材料的微观结构及断面形态.研究结果表明:双单体无皂乳液聚合方法是一种很好的纳米碳酸钙表面改性方法,当单体的配比和种类适当时,复合微粒对PVC可同时起到增强和增韧的作用,纳米碳酸钙复合微粒与基体的牢固结合以及大量的拉丝状结构是复合微粒对PVC增强增韧的关键因素.

Preparation of Nano-CaCO3 composite and mechanical properties of nano-CaCO3-PVC composite

By means of soapless emulsion polymerization method,the double-monomer polymerization of methyl methacrylate(MMA) and Butyl acrylate(BA) on the surface of Nano-CaCO3 in aqueous phase was researched.The nano-CaCO3 composite particle was produced.The effect of nano-particles on the structure and the mechanical properties of Nano-CaCO3/PVC composites was analyzed.The microstructure of nano-CaCO3 composite dispersed in the composites matrix was observed by TEM.The morphology of the fracture surface of composites was detected by SEM.The result showed that soapless emulsion polymerization with double monomer was a good way of nano-CaCO3 modification.The toughness and strength of composites material increased dramatically with the addition of nano-CaCO3 composite particles in which the ratio and sort of monomer were rational.It was confirmed that the "Silk"structure and the strong combination were the vital components for the strength and toughness of PVC/nano-CaCO3 composite materials.