文献类型：期刊文献

中文题名：聚(甲基丙烯酸甲酯-CO-苯乙烯)/聚硅氧烷核壳微球的制备与应用

英文题名：Preparation and application of micron-size poly(methyl methacrylate-co-styrene)/polysiloxane core/shell microspheres

作者：陆馨[1];辛忠[1];李春[1]

机构：[1]华东理工大学化工学院产品工程系,化学工程联合国家重点实验室,上海200237

年份：2011

卷号：62

期号：2

起止页码：539

中文期刊名：化工学报

外文期刊名：CIESC Journal

收录：CSTPCD;;EI(收录号：20111313882302);Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金项目(21006025);中央高校基本科研业务费专项资金(WA1013012);上海市科委纳米专项基金项目(0352nm078)~~

语种：中文

中文关键词：甲基丙烯酸甲酯;苯乙烯;聚硅氧烷;核壳微球;光散射剂

外文关键词：methyl methacrylate; styrene; polysiloxane; core/shell microspheres; light scattering agent

摘要：采用分散聚合法制备出聚(甲基丙烯酸甲酯-co-苯乙烯)种子微球,再将种子微球与甲基三甲氧基硅烷的水解溶液混合,加入氨水使硅烷水解产物在种子微球表面缩聚,制备出聚(甲基丙烯酸甲酯-co-苯乙烯)/聚硅氧烷核壳微球。采用SEM、TEM、粒度分析仪和FTIR对微球的形貌、核壳结构、粒径和化学组成等进行表征。发现在合成种子微球时提高甲基丙烯酸甲酯在共聚单体中的投料比,可使相应核壳微球的折光指数下降。将核壳微球作为光散射剂添加在聚甲基丙烯酸甲酯(PMMA)中制备出光散射材料。结果表明,核壳微球可显著提高PMMA样片的雾度,且PMMA样片的雾度随着核壳微球与PMMA的折光指数之间差值的增加而增加;当核壳微球的添加浓度为2%～3%(质量)时,制得的PMMA样片(2mm)的有效光散射系数均达到55%以上。
Micron-size poly（methyl methacrylate-co-styrene）/polysiloxane core/shell microspheres were synthesized.Firstly,poly（methyl methacrylate-co-styrene）microspheres were prepared by dispersion copolymerization and acted as seed microspheres.Secondly,methyl trimethoxylsilane was hydrolyzed,mixed with the seed microspheres and then condensed to generate polysiloxane shells on the surface of seed microspheres by adding aqueous NH4OH as catalyst.The morphology,core/shell structure,size and chemical structure of the core/shell microspheres were investigated by SEM,TEM,size analyzer and FTIR,respectively.The refractive indices of the relevant core/shell microspheres decreased with increasing feed amount of methyl methacrylate in the co-monomers in the seeds.The microspheres as light scattering agents were blended with polymethyl methacylate（PMMA）resin to prepare a light scattering material.The results indicated that core/shell microspheres could significantly improve the haze of PMMA sheet（2 mm）and the haze of PMMA sheet was enhanced corresponding to the increase of Δn,the difference of refractive indices between light scattering agents and PMMA.When the concentration of core/shell microspheres was between 2% and 3%（mass）,the light scattering material with effective light scattering coefficient more than 55% could be obtained.