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A novel and simple method of preparation of poly(styrene-B-2-vinylpyridine) block copolymer of narrow molecular weight distribution: Living anionic polymerization followed by mechanism transfer to controlled/"living" radical polymerization (ATRP)
Ayothi Ramakrishnan,
Published in Marcel Dekker Inc.
Volume: 37 A
Issue: 6
Pages: 621 - 631
A novel and simple method of preparation of a block copolymer of styrene and 2-vinylpyridine with narrow molecular weight distribution is reported. The novelty lies in the transformation of the polymerization mechanism from living anionic to controlled/"living" radical polymerization (ATRP). Thus, anionic polymerization of styrene is carried out in benzene using secbutyllithium as the initiator followed by termination with ethylene oxide to prepare hydroxy-terminated polystyrene (PS-OH). PS-OH is converted to chloride-terminated polystyrene (PS-Cl) by a displacement reaction involving thionyl chloride and pyridine in benzene. PS-Cl is used to initiate the heterogeneous ATRP of 2-vinylpyridine in p-xylene with CuCl/2,2'-bipyridine system. The polymers synthesized are characterized by gel permeation chromatography (GPC), thin layer chromatography (TLC), IR and proton NMR spectroscopies. Copyright © 2000 by Marcel Dekker, Inc.
About the journal
JournalJournal of Macromolecular Science - Pure and Applied Chemistry
PublisherMarcel Dekker Inc.
Open AccessNo