Effect of vinyl pivalate/vinyl acetate comonomer composition on the self-assembled morphology of poly(vinyl alcohol) prepared by in situ fibrillation: Preparation of PVA with a spherical morphology

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dc.contributor.authorChirowodza H.
dc.contributor.authorZou M.
dc.contributor.authorSanderson R.D.
dc.date.accessioned2011-05-15T15:59:26Z
dc.date.available2011-05-15T15:59:26Z
dc.date.issued2010
dc.description.abstractThe photoinitiated copolymerization of vinyl pivalate (VPi) and vinyl acetate (VAc) was carried out in bulk. Varying monomer feed ratios of VPi/VAc (mol %/mol %) of 100/0, 90/10, 60/40, 50/50, and 30/70 were used. Polyvinyl alcohol (PVA) with s-diad contents ranging from 61.8% to 55.7% was obtained. The morphology and thermal properties of the different PVA samples were investigated. PVA prepared from PVPi homopolymer resulted in PVA with a well-aligned microfibrillar structure. With a decrease in the VPi content in the precursor polymer, the fibrous morphology was gradually lost, resulting in PVA with mixtures of fibrillar and spherical structures. When the PVPi content was 38.5 mol %, only spherical particles were observed. © 2010 Wiley Periodicals, Inc.
dc.description.versionArticle
dc.identifier.citationJournal of Applied Polymer Science
dc.identifier.citation117
dc.identifier.citation6
dc.identifier.issn218995
dc.identifier.other10.1002/app.32223
dc.identifier.urihttp://hdl.handle.net/10019.1/11173
dc.subjectComonomer composition
dc.subjectFeed ratios
dc.subjectFibrous morphology
dc.subjectHomopolymers
dc.subjectIn-situ
dc.subjectMicrofibrillar
dc.subjectPrecursor polymers
dc.subjectSelf-assembled
dc.subjectSpherical morphologies
dc.subjectSpherical particle
dc.subjectSpherical structures
dc.subjectSyndiotactics
dc.subjectThermal properties
dc.subjectVinyl acetates
dc.subjectVinyl pivalate
dc.subjectWell-aligned
dc.subjectBlock copolymers
dc.subjectCopolymerization
dc.subjectMorphology
dc.subjectOrganic polymers
dc.subjectSelf assembly
dc.subjectSpheres
dc.subjectThermodynamic properties
dc.subjectPolyvinyl acetates
dc.subjectchemical composition
dc.subjectcopolymerization
dc.subjectfibrillation
dc.subjecthomopolymer
dc.subjectmonomer
dc.subjectpolyvinyl alcohol
dc.subjectprecursor
dc.subjectsyndiotactic polymer
dc.subjectthermal property
dc.titleEffect of vinyl pivalate/vinyl acetate comonomer composition on the self-assembled morphology of poly(vinyl alcohol) prepared by in situ fibrillation: Preparation of PVA with a spherical morphology
dc.typeArticle
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