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Encapsulated clay particles in polystyrene by RAFT mediated miniemulsion polymerization

dc.contributor.authorSamakande A.
dc.contributor.authorSanderson R.D.
dc.contributor.authorHartmann P.C.
dc.date.accessioned2011-05-15T16:03:41Z
dc.date.available2011-05-15T16:03:41Z
dc.date.issued2008
dc.identifier.citationJournal of Polymer Science, Part A: Polymer Chemistry
dc.identifier.citation46
dc.identifier.citation21
dc.identifier.issn0887624X
dc.identifier.other10.1002/pola.23016
dc.identifier.urihttp://hdl.handle.net/10019.1/12733
dc.description.abstractRAFT grafted montmorillonite (MMT) clays [i.e., N,N-dimethyl-N-(4- (((phenylcarbonothioyl)thio)methyl)benzyl)ethanammonium-MMT (PCDBAB-MMT) and N-(4-((((dodecylthio)carbonothioyl)thio)methyl)benzyl)-N,N- dimethylethanammonium-MMT (DCTBAB-MMT)] of various loadings were dispersed in styrene (S) monomer and the resultant mixtures emulsified and sonicated in the presence of a hydrophobe (hexadecane) into miniemulsions. The stable miniemulsions thus obtained were polymerized to yield encapsulated polystyrene-clay nanocomposites (PS-CNs). The molar mass and polydispersity index (PDI) of the PS-CNs depended on the amount of RAFT agent in the system, in accordance with the features of the RAFT process. The morphology of the PS-CNs ranged from partially exfoliated to an intercalated morphology, depending on the percentage clay loading. The thermomechanical properties of the PS-CNs were better than those of the neat PS polymer, and were dependent on the molar mass, PS-CN morphology and clay loading. The similarities and differences of the PS-CNs prepared here by miniemulsion polymerization were compared to those prepared using the same RAFT agents and polymer system by bulk polymerization (as reported by us in a previous article). © 2008 Wiley Periodicals, Inc.
dc.subjectABS resins
dc.subjectAgents
dc.subjectChemical reactions
dc.subjectEmulsification
dc.subjectFree radical polymerization
dc.subjectLoading
dc.subjectMonomers
dc.subjectNanocomposites
dc.subjectNanostructured materials
dc.subjectParaffins
dc.subjectPolydispersity
dc.subjectPolyethylene terephthalates
dc.subjectPolymer matrix composites
dc.subjectPolymerization
dc.subjectPolymers
dc.subjectPolystyrenes
dc.subjectSemiconductor quantum dots
dc.subjectSilicate minerals
dc.subjectStyrene
dc.subjectBulk polymerizations
dc.subjectClay loadings
dc.subjectClay nanocomposites
dc.subjectClay particles
dc.subjectDodecylthio
dc.subjectHexadecane
dc.subjectMini emulsions
dc.subjectMiniemulsion polymerizations
dc.subjectMolar mass distribution
dc.subjectMontmorillonite clays
dc.subjectPolydispersity indices
dc.subjectPolymer systems
dc.subjectRaft agents
dc.subjectRaft processes
dc.subjectReversible addition fragmentation chain transfer (RAFT)
dc.subjectStructure-property relationships
dc.subjectThermo-mechanical properties
dc.subjectClay minerals
dc.titleEncapsulated clay particles in polystyrene by RAFT mediated miniemulsion polymerization
dc.typeArticle
dc.description.versionArticle


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