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Xanthate-mediated copolymerization of vinyl monomers for amphiphilic and double-hydrophilic block copolymers with poly(ethylene glycol)

dc.contributor.authorPound G.
dc.contributor.authorAguesse F.
dc.contributor.authorMcLeary J.B.
dc.contributor.authorLange R.F.M.
dc.contributor.authorKlumperman B.
dc.date.accessioned2011-05-15T15:59:55Z
dc.date.available2011-05-15T15:59:55Z
dc.date.issued2007
dc.identifier.citationMacromolecules
dc.identifier.citation40
dc.identifier.citation25
dc.identifier.issn249297
dc.identifier.other10.1021/ma0710075
dc.identifier.urihttp://hdl.handle.net/10019.1/11435
dc.description.abstractTwo xanthate end-functional poly(ethylene glycol)s (PEGs) were tested as macromolecular chain-transfer agents (macroCTA) in the reversible addition-fragmentation transfer-mediated polymerization of vinyl acetate (VAc) and N-vinylpyrrolidone. The macroCTA leaving group played a determining role in the preparation of the block copolymers. PEG-b-PVAc and PEG-è-PVP diblock copolymers were obtained when the macroCTA had a propionyl ester leaving group, whereas under the same experimental conditions the macroCTA with a phenylacetyl ester leaving group inhibited the polymerization. In situ 1H NMR spectroscopy polymerizations were performed with low molecular weight xanthate analogues to investigate the cause of inhibition. Block copolymers were prepared with the macroCTA which did not inhibit the polymerization and were characterized via size exclusion chromatography, high-performance liquid chromatography, and matrix-assisted laser desorption ionization time-of-flight mass spectrometry. The ability to produce narrowly distributed (PDI < 1.4) block copolymers end capped with a xanthate moiety with little to no homopolymer contaminant is presented. © 2007 American Chemical Society.
dc.subjectBlock copolymers
dc.subjectEsters
dc.subjectMonomers
dc.subjectPolyethylene glycols
dc.subjectVinyl resins
dc.subjectChain-transfer agents
dc.subjectPhenylacetyl ester
dc.subjectVinyl monomers
dc.subjectCopolymerization
dc.titleXanthate-mediated copolymerization of vinyl monomers for amphiphilic and double-hydrophilic block copolymers with poly(ethylene glycol)
dc.typeArticle
dc.description.versionArticle


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