文献类型：期刊文献

中文题名：纳米碳酸钙表面原位聚合聚甲基丙烯酸甲酯微结构及性能

英文题名：Microstructure and Properties of Poly(methyl methacrylate) Coated on the Surface of Calcium Carbonate Nanopaticles by in-situ Polymerization

作者：陈雪花[1];李春忠[1];邵玮[1];张玲[1]

机构：[1]华东理工大学材料科学与工程学院超细材料制备与应用教育部重点实验室,上海200237

年份：2006

卷号：32

期号：2

起止页码：212

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：上海市基础研究重大项目(04DZ14002);国家自然科学基金(2023602020176009);国家基础研究重大项目前期研究专项项目(2002CCA02200);上海市重点实验室专项基金(04DZ05622);教育部重点项目(02159);上海市纳米科技基金项目等资助

语种：中文

中文关键词：聚甲基丙烯酸甲酯;纳米碳酸钙;微观结构;乳液聚合

外文关键词：poly （methyl methacrylate）; calcium carbonate nanoparticles; microstructure; in-situ emulsion polymerization

摘要：利用原位乳液聚合在纳米碳酸钙(CaCO3)粒子表面接枝包覆了聚甲基丙烯酸甲酯(PM-MA),借助于FT IR1、H-NMR、TGA和GPC等手段研究了PMMA界面层结构、热稳定性及分子量分布。结果表明:纳米CaCO3粒子表面接枝的PMMA以间同(rr)立构结构为主,其含量约52.8%;热稳定性介于无皂和有皂乳液聚合之间,热分解温度比无皂乳液聚合的PMMA高约50°C,其分解主要由PMMA亚乙烯基链端的β-断裂及自由链断裂引起。纳米碳酸钙表面接枝的PM-MA分子量比均聚物大,分布也较宽。纳米CaCO3粒子的存在对PMMA的微结构没有影响,但对PMMA的热稳定性、分子量及其分布有影响。
The microstructure, thermal properties, and molecule weight and its distribution of PMMA coated on the surface CaCO3 nanoparticles by in-situ emulsion polymerization were studied by FTIR,^1H-NMR, TG and GPC. The results indicate that the main tacticity of PMMA which coated on the surface of CaCO3 nanoparticles is syndiotactic （rr）, and its content is about 52, 8%. The thermal decomposition temperature of coated PMMA is between that of PMMA prepared by emulsifier-free emulsion polymerization and PMMA by emulsion polymerization with emulsifier, and is higher about 50℃ than that by emulsifier-free emulsion polymerization. The molecular weight of coated PMMA is higher than that of PMMA homopolymerized, and its polydispersity is wider than that of PMMA homopolymerized. The presence of CaCO3 nanoparticles affects only on the thermal properties and its molecular weight distribution but not on the microstructure of PMMA.