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Block copolymers by transformation of living anionic polymerization into controlled/“living” atom transfer radical polymerization
Author(s) -
Acar Metin H.,
Matyjaszewski Krzysztof
Publication year - 1999
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/(sici)1521-3935(19990501)200:5<1094::aid-macp1094>3.0.co;2-i
Subject(s) - copolymer , atom transfer radical polymerization , polymer chemistry , styrene , living polymerization , living free radical polymerization , living anionic polymerization , anionic addition polymerization , polystyrene , radical polymerization , methyl methacrylate , polymerization , chemistry , acrylonitrile , methyl acrylate , reversible addition−fragmentation chain transfer polymerization , chain transfer , materials science , polymer , organic chemistry
A method for the transformation of living anionic polymerization (LAP) to controlled/“living” atom transfer radical polymerization (ATRP) is reported and utilized for the preparation of block copolymers. The macroinitiators, polystyrene and polystyrene‐ block ‐polyisoprene containing the 2‐bromoisobutyryl end group (PS‐Br, M n = 12 200, M w / M n = 1.04; PS‐ b ‐PIP‐Br, M n = 16 800, M w / M n = 1.03), were prepared by LAP of styrene and styrene/isoprene, correspondingly, and suitable termination agents. These compounds were used as macroinitiators for controlled/“living” ATRP to prepare block copolymers with methyl acrylate (PS‐ b ‐PMA), butyl acrylate (PS‐ b ‐PBA), methyl methacrylate (PS‐ b ‐PMMA), a mixture of styrene and acrylonitrile (PS‐ b ‐P(S‐ r ‐AN)) and also chain extension with styrene (PS‐ b ‐PS and PS‐ b ‐PIP‐ b ‐PS). The block copolymers were characterized by means of size exclusion chromatography, 1 H NMR and FT‐IR spectroscopy.