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Synthesis and characterization of methyl methacrylate/styrene hyperbranched copolymers via living radical mechanism
Author(s) -
Ishizu Koji,
Park Jaebum,
Ohta Yoshihiro,
Shibuya Takeshi
Publication year - 2003
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.12161
Subject(s) - copolymer , polymer chemistry , methyl methacrylate , styrene , monomer , reactivity (psychology) , polymerization , materials science , lewis acids and bases , radical polymerization , chemistry , polymer , organic chemistry , catalysis , medicine , alternative medicine , pathology
Free‐radical copolymerizations of N,N‐ diethylaminodithiocarbamoylmethylstyrene (inimer: DTCS) with a methyl methacrylate (MMA)/zinc chloride (ZnCl 2 ) complex were carried out under UV light irradiation. DTCS monomers play an important role in this copolymerization system as an inimer that is capable of initiating living radical polymerization of the vinyl group. The reactivity ratios ( r 1 = 0.56 and r 2 = 0.52: DTCS [ M 1 ]; MMA [ M 2 ]) obtained for this copolymerization system were different from a corresponding model system (alternating copolymer) of a styrene and MMA/ZnCl 2 complex ( r 1 = 0.25 and r 2 = 0.056). It was found that the hyperbranched copolymers produced exhibited a random branching structure. It was found that the Lewis acid ZnCl 2 formed the complex not only with MMA but also with the carbamate group of inimer. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 2490–2495, 2003