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Syndiotactic Polystyrene/Carbon Nanotube Composites  
Syndiotactic Polystyrene/Carbon Nanotube Composites
资料类型: PDF文件
关键词: Composites  Syndiotactic  polystyrene  Carbon  nanotube  
资料大小: 75K
所属学科: 通用高分子材料
来源: 来源网络
简介:
Inrecentyears,polymer/inorganicnanocompositeshavereceivedmuchattentionduetotheiruniquestructure,excellentpropertiesandvariousapplications.cl]Here,weintroducetherecentworkofsyndiotacticpolystyrene(sPS)/multi-walledcarbonnanotube(MWCNT)compositesinourresearchgroup.First,aneffectivedispersingsolventofN-methyl-2-pyrrolidinone(NMP)wasemployedinthepreparationofsPS/MWCNTcomposites.Thecrystallizationbehaviorsandthepropertiesofthecompositeswerestudiedaswell.TheresultsshowthattheMWCNTsincreasedthesPScrystallizationtemperature,broadenedthecrystallitesizedistributionandfavoredtheformationofthermodynamicallystable(3crystals.Additionally,thesPS/MWCNTcompositesexhibiteddramaticallyincreaseelectricalconductivityandthermalstabilityrelativetotheneatsPSduetothewelldispersionofMWCNTsinthepolymermatrixE21.Later,westudiedtheorientationstructuresoftheunaxiallyhot-drawnsPS/MWCNTnanocompositefilms.TheinfrareddichroismstudiesshowedthattheMWCNTshadanobvioushindranceeffectonthepreferredparallelorientationforboththemainchain(-CH2-segments)andthesidegroups(benzenerings)ofthesPS.Alternatively,theresultsofpolarizedRamanspectroscopydemonstratedthepreferredparallelorientationoftheMWCNTsparalleledtotheuniaxialstretchingdirectioninthestretchedfilmsc3,4].Subsequently,weobservedcomplexflower-likepatternsforthehot-pressedsPS/MWCNTcompositefilmsc5].Veryrecently,anin-situFTIRspectroscopicmethodbasedoncurefittingwasemployedtostudythemesomorphicbehaviorinthesPS/MWCNTnanocompositefilms.
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