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Polystyrene‐ block ‐polylactide obtained by the combination of atom transfer radical polymerization and ring‐opening polymerization with a commercial dual initiator
Author(s) -
Dirany Mohammed,
LacroixDesmazes Patrick,
Vayer Marylène,
Erre René,
Boutevin Bernard,
Sinturel Christophe
Publication year - 2011
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.34101
Subject(s) - atom transfer radical polymerization , polymer chemistry , copolymer , materials science , polymerization , polystyrene , dispersity , chain transfer , living free radical polymerization , ring opening polymerization , radical polymerization , living polymerization , chemical engineering , polymer , composite material , engineering
A polystyrene (PS)‐ b ‐polylactide (PLA) block copolymer was prepared from the combination of atom transfer radical polymerization and ring‐opening polymerization with commercially available 2,2,2‐tribromoethanol as a dual initiator in a sequential two‐step procedure. Hydroxyl‐terminated polystyrene (PS‐OH)s with various molecular weights were first prepared with polydispersity indices lower than 1.3; these provided valuable macroinitiators for the polymerization of D,L ‐lactide. A block copolymer with a composition allowing the formation of hexagonally packed PLA cylinders in a PS matrix was then obtained. The PS‐ b ‐PLA thin films revealed, after vapor solvent annealing, a hexagonally packed organization of the PLA cylinders, which was oriented perpendicularly to the surface of the film. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011