文献类型：期刊文献

英文题名：Synthesis of Spherical Polyelectrolyte Brushes by Thermo-controlled Emulsion Polymerization

作者：Wang, Xiang[1];Xu, Jun[1];Li, Li[1];Wu, Shuang[1];Chen, Qingchuan[1];Lu, Yan[2];Ballauff, Matthias[2];Guo, Xuhong[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Helmholtz Zentrum Berlin Mat & Energie GmbH, D-14109 Berlin, Germany

年份：2010

卷号：31

期号：14

起止页码：1272

外文期刊名：MACROMOLECULAR RAPID COMMUNICATIONS

收录：;EI(收录号：20103213137696);WOS:【SCI-EXPANDED(收录号:WOS:000280544500006)】；

基金：Financial support from the National Natural Science Foundation of China (Grant No. 20644003, 20774028), Shanghai Shuguang Plan Project (06SG35) and Shanghai Pujiang Talent Project (08PJ14036) is gratefully acknowledged.

语种：英文

外文关键词：dynamic light scattering; emulsion polymerization; initiators; polyelectrolytes; surfaces

摘要：A novel method of thermo-controlled emulsion polymerization has been employed to synthesize spherical polyelectrolyte brushes that consist of a solid polystyrene core and a poly (acrylic acid) (PAA) shell covalently attached on the core surface densely by one end. The growth of brushes from the core surface was monitored by dynamic light scattering (DLS). The particle size of PS core latex showed a narrow size distribution when observed by scanning electron microscopy (SEM). The brush size changed significantly upon changing pH value and ionic strength, and displayed similar behavior to brushes prepared by photo-emulsion polymerization. The grafting density of the PAA brush, which was determined by cutting off the PAA chains using alkali hydrolysis, confirmed the formation of PAA brushes.