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Download fileOne-Pot Preparation of Methacrylate/Styrene Alternating Copolymers via Radical Copolymerization and Alcoholysis Modification: Sequence Impacts on Glass Transition Temperature
journal contribution
posted on 2021-06-29, 17:36 authored by Yuki Kametani, Makoto OuchiA series of methacrylate/styrene
alternating copolymers were efficiently
and systematically synthesized via alternating copolymerization of
saccharin methacrylamide (1) with styrene and subsequent
one-pot alcoholysis transformation with alcohols. The saccharin amide
bond in 1 was stable enough that 1 was used
as a bench-stable monomer, but the bond became reactive toward alcohols
after the copolymerization. Thanks to the specific feature, the postpolymerization
modification could be performed under mild conditions despite easy
handling of the monomer. The quantitative transformation as well as
the alternating sequence were certainly supported by 1H
NMR and MALDI-TOF-MS analyses. The alternating copolymers carrying
relatively short alkyl pendants expressed lower glass transition temperatures
than those of the statistical counterparts. Moreover, the alternating
copolymerization was controlled via a RAFT polymerization system,
affording a unique block copolymer composed of alternating copolymer
segments.
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Glass Transition TemperatureRAFT polymerization systemsaccharin amide bondAlcoholysis Modification1 H NMRsaccharin methacrylamidepostpolymerization modificationRadical Copolymerizationcopolymerizationcopolymersbench-stable monomerblock copolymeralkyl pendantscopolymer segmentsone-pot alcoholysis transformationSequence Impactsglass transition temperaturesMALDI-TOF-MS analysesOne-Pot Preparation