文献类型：期刊文献

英文题名：Synthesis and Characterization of Functional Gradient Copolymers of 2-Hydroxyethyl Methacrylate and tert-Butyl Acrylate by Atom Transfer Radical Polymerization

作者：He, Juan[1,2];Wang, Yufeng[2,3];Lin, Qunfang[2];Chen, Ligen[2];Zhou, Xiaodong[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[3]Shanghai Zhongyuan Chem Co Ltd, Shanghai 200431, Peoples R China

年份：2009

卷号：46

期号：4

起止页码：405

外文期刊名：JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY

收录：;EI(收录号：20091211963705);WOS:【SCI-EXPANDED(收录号:WOS:000263873900009)】；

语种：英文

外文关键词：atom transfer radical polymerization; 2-hydroxyethyl methacrylate; tert-butyl acrylate; gradient copolymers

摘要：Functional spontaneous gradient copolymers of 2-hydroxyethyl methacrylate (HEMA) and tert-butyl acrylate (tBA) were synthesized by atom transfer radical polymerization (ATRP) in cyclohexanone at 50C. The copolymers were characterized by nuclear magnetic resonance spectroscopy (1H-NMR) and gel permeation chromatograph (GPC). Comonomer conversions were determined by gas chromatograph (GC) and the kinetic behavior for HEMA/tBA copolymerization was analyzed, indicating that the copolymerization proceeds in a controlled way. The monomer reactivity ratios rHEMA = 4.497 and rtBA = 0.212 were estimated using an extended Kelen-Tudos method from copolymer composition data. Atomic force microscopy (AFM) images demonstrated the changes of surface morphology of poly(HEMA-grad-tBA) polymerized for different times and the changes were correlated to the composition of the copolymers.