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Block copolymerization of poly(ethylene glycol) and methyl acrylate using potassium diperiodatocuprate(III)
Author(s) -
Liu Yinghai,
Bai Libin,
Zhang Rongyue,
Li Yanxiang,
Liu Yuanwei,
Deng Kuilin
Publication year - 2005
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.21594
Subject(s) - copolymer , ethylene glycol , polymer chemistry , monomer , peg ratio , methyl acrylate , chemistry , redox , acrylate , aqueous solution , materials science , organic chemistry , polymer , finance , economics
Block copolymers of methyl acrylate (MA) and poly(ethylene glycol) (PEG) have been obtained using a novel redox system—potassium diperiodatocuprate(III)[DPC]/PEG system in alkaline aqueous medium. Block copolymers with a high percentage of blocking were obtained, which indicated that the DPC/PEG redox system was an efficient initiator for this blocking. Effects of different conditions (concentration of reactants, temperature, concentration of the DPC, and reaction time) on the total conversion, percentage of blocking, and intrinsic viscosity were examined. The effects of different monomers and various PEGs with different molecular weight on the total conversion were also examined. A mechanism is proposed to explain the generation of radicals and the initiation of block compolymerization. Some basic properties of the block copolymers were also studied by thermogravimetry and scanning electron microscope. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 96: 2139–2145, 2005