资源描述：
《Morphology and rheology of immiscible polymer blends filled.pdf》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、Polymer48(2007)6029e6040www.elsevier.com/locate/polymerMorphologyandrheologyofimmisciblepolymerblendsfilledwithsilicananoparticlesL.Eliasa,b,F.Fenouillotc,J.C.Majested,Ph.Cassagnaua,b,*aUniversite´deLyon1,Universite´deLyon,LyonF-69003,FrancebCNRSUMR522
2、3,Inge´nieriedesMate´riauxPolyme`reseLaboratoiredesMate´riauxPolyme`resetBiomate´riaux,F-69622Villeurbanne,FrancecInge´nieriedesMate´riauxPolyme`reseLaboratoiredesMate´riauxMacromole´culaires(IMP/LMM),UMR-CNRS5223,INSA-Lyon,17AvenueJeanCapelle,69621Vi
3、lleurbanneCedex,FrancedInge´nieriedesMate´riauxPolyme`reseLaboratoiredeRhe´ologiedesMatie`resPlastiques(IMP/LRMP),UMR-CNRS5223,Universite´JeanMonnet,23ruedudocteurPaulMichelon,42023SaintEtienneCedex2,FranceReceived10May2007;receivedinrevisedform22June
4、2007;accepted26July2007Availableonline7August2007AbstractTheeffectofsilicananoparticlesonthemorphologyandtherheologicalpropertiesofanimmisciblepolymerblend(polypropylene/polysty-2rene,PP/PS70/30)wasinvestigated.Twotypesofpyrogenicnanosilicawereused:ah
5、ydrophilicsilicawithaspecificsurfaceareaof200m/g2andahydrophobicsilicahavingaspecificsurfaceareaof150m/g.First,asignificantreductioninthePSdropletvolumeradius,from3.25tonearly1mmforfilledblendswith3wt%silica,wasobserved.Moreinterestingly,imageanalysisofth
6、emicrographsprovedthatthehydrophilicsilicatendstoconfineinthePSphasewhereashydrophobiconewaslocatedinthePPphaseandatthePP/PSinterface(interphasethick-nessz100e200nm).Furthermore,amigrationofhydrophilicsilicafromPPphasetowardPSdomainswasobserved.Ananaly
7、sisoftherheologicalexperimentaldatawasbasedontheframeworkofthePaliernemodel,extendedtofilledimmiscibleblends.Duetothepartitionofsilicaparticlesinthetwophasesanditsinfluenceontheviscosityratio,limitedcaseshavebeeninvestigated.Therhe-ologicaldataobtainedw
8、iththehydrophobicsilicaweremoredifficulttomodelsincetheexistenceofathickinterphasecannotbetakenintoaccountbythemodel.Finally,thehypothesisthathydrophilicsilicaishomogeneouslydispersedinPSdropletsandthathydrophobicsilicaisdispersedinPPmatrixwasm
