The Location, Migration and Self-assembly of Carbonaceous Nanoparticles in Polymer Blends and Their Electrical Properties，第六届亚欧研讨会上处理和性能增强聚合物会议文集（2013.6.2-6 武汉）-中国聚合物网,论文下载

The Location, Migration and Self-assembly of Carbonaceous Nanoparticles in Polymer Blends and Their Electrical Properties

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location migration self-assembly of carbon nanoparticles polymer
blends electrical properties

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分子表征

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第六届亚欧研讨会上处理和性能增强聚合物会议文集（2013.6.2-6 武汉）

简介：

Greatattentionswerepaidtolarge-scalepreparationofconductivecarbonaceousnanoparticles/polymernanocomposites(CNPN)withlowelecticalperlocationthresholdviathecommonusedmachiningprocess.Itisknownthattheelectricalpercolationthresholdnotonlydependsontheconductivityofthefillers,butalsodependsonthedispersionandmorphologyofthefillersinthepolymermatrix.Therefore,itisaneasyandefficientwaytoimprovetheelectricalpropertiesofCNPNbycontrollingtheirstructuresandmorphologies.Inthecurrentstudy,wegiveseveralexamplestodemonstratehowtotunethelocation,migrationandself-assemblyofcarbonaceousnanoparticlesinpolymerblendstoimprovetheirelectricalproperties.InFigurel,wepresentthevariationofACelectricalconductivityasafunctionofthecontentofthefilledoctadecylamine-functionalizedgraphene(GE-ODA)inthepolystyrene(PS),poly(methylmethacrylate)(PMMA),andblendsofPS/PMMA(50w/50w),respectively.EilItisclearthattheelectricalpercolationthresholdsofbothPS/GE-ODAandPMMA/GE-ODAcompositesareintherangeofl.5wt%and2.0wt%.However,theelectricalpercolationthresholdofPS/PMMA/GE-ODAisaslowas0.5wt%.Thereasoncanbeascribedtodoublepercolationphenomenon,thatisGE-ODAnanosheetsselectivelylocateinPSphaseandthePS/PMMAblendformsaco-continuousstructure.[2]Asaresult,onlyasmallamountofGE-ODAisneededtobuildthepercolationnetworkstructure.Ontheotherhand,alltheCNPNareelectricalisotropybecauseelectricalfillersarerandomlydistributedinthepolymermatrix.Inthecurrentstudy,wepreparedtheGE-ODA/SEBS/PP(1.50/9.85/88.65)nanocompositeswithparallelstripscomposedofGE-ODAviatheinductionofshearflow,asshownintheopticalmicrographinFigure2ac3].Thismaterialdisplaysasignificantanisotropyintheelectricalresistivity,i.e.,theelectricalresistivityofthestripesintheperpendiculardirectionis3.4X109,Q,.m,whereastheelectricalresistivityintheparalleldirectionis3.5X105,Q,.m,asshowninFigure2(b).

作者：

C. Mao, J. R. Huang, Y. T. Zhu, W. Jiang

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2013-06-26 14:47:37

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