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The Location, Migration and Self-assembly of Carbonaceous Nanoparticles in Polymer Blends and Their Electrical Properties  
The Location, Migration and Self-assembly of Carbonaceous Nanoparticles in Polymer Blends and Their Electrical Properties
資料類型： PDF文件
關(guān)鍵詞： location  migration  self-assembly  of  carbon  nanoparticles  polymer  
blends  electrical  properties  
資料大?。?/td> 209K
所屬學(xué)科： 分子表征
來(lái)源： 第六屆亞歐研討會(huì)上處理和性能增強(qiáng)聚合物會(huì)議文集（2013.6.2-6 武漢）
簡(jiǎn)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
上傳時(shí)間： 2013-06-26 14:47:37
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