文献类型：期刊文献

英文题名：Synthesis and characterization of gradient copolymer composed of styrene and methyl methacrylate in water dispersion system

作者：Zhang, B; Zhang, ZB; Wan, XL; Hu, CP; Ying, SK

机构：[1]E China Univ Sci & Technol, Lab Living Polymerizat, Shanghai 200237, Peoples R China

年份：2004

卷号：25

期号：6

起止页码：1170

外文期刊名：CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE

收录：;EI(收录号：2004358330434);WOS:【SCI-EXPANDED(收录号:WOS:000222170400046)】；

语种：英文

外文关键词：atom transfer radical polymerization; water dispersion system; gradient copolymer; styrene; methyl methacrylate

摘要：The controllability as well as the monomer reactivity for the atom transfer radical copolymerization of styrene(St) and methyl methacrylate(MMA) in water dispersion system was examined with ethyl 2-bromoisobutyrate as the initiator, CuBr/CuBr2/1,10-phenanthroline as catalyst and sodium laurylsulfonate as surfactant, respectively. The gradient copolymerization of St and MMA was performed in the water dispersion system with continuous addition of the second monomer MMA into the copolymerization systems The experimental results showed that the water dispersion gradient copolymerization proceeded in a living fashion, producing well-defined copolymers with narrow polydispersities and controlled molecular weights. The increase of the cumulative composition and instantaneous composition of MMA unit along the copolymer chain length demonstrated that the gradient copolymer composed of St and MMA was successfully synthesized in such a water dispersion system.