文献类型：期刊文献

英文题名：Double-shell surface modifications of large poly(methyl methacrylate) spheres

作者：Guo, Weihong[1]; Durant, Yvon G.[2]; Wang, Jikui[1]; Wu, Chifei[1]

机构：[1]E China Univ Sci & Technol, Dept Mat Sci & Engn, Polymer Alloy Res Grp, Shanghai 200237, Peoples R China;[2]Univ New Hampshire, Adv Polymer Lab, Durham, NH 03824 USA

年份：2005

卷号：96

期号：3

起止页码：829

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;EI(收录号：2005189075826);WOS:【SCI-EXPANDED(收录号:WOS:000227823500030)】；

语种：英文

外文关键词：surface modification; large spheres; crosslink; enamine

摘要：Two reactive shells were polymerized on poly(methyl methacrylate) (PMMA) spheres to improve the compatibility of the spheres with a paint binder. By adjusting the buoyancy of the polymerization medium, PMMA, retroreflective spheres with an average diameter of 600 mu m were successfully modified with a thin cross-linked layer together with an amine functional layer outside on the surface. The cross-linked layer was polymerized by methyl methacrylate and ethylene glycol dimethacrylate by suspension polymerization. After that, a second monomer with functional amine group was polymerized and a functional layer was formed on the surface. The amine groups on the modified spheres can react with the enamine groups of acetoacetate already formulated in the binder and connected the spheres and the paint by chemical bond. The structure of the modified spheres was studied using transmission election microscopy, FTIR, DSC, and other tests.(c) 2005 Wiley Periodicals, Inc.