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Network formation and crystallization behavior of the in-situ prepared isotatic polypropylene/graphene composites

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資料大小：

326K

所屬學(xué)科：

分子表征

來源：

第十屆高分子物理國(guó)際研討會(huì)（PP’2012)(2012.6.4~8，成都）

簡(jiǎn)介：

Thenewmaterialofisotaticpolypropylene/graphene(iPP/G)compositeshaverecentlybeensynthesizedviainsituZiegler-NattapolymerizationbyHuang1.Thecompositesshowsuperiorthermalpropertyandalowelectricalpercolationwitheffectivedispersionofgrapheneplates.Whenthecontentofthegrapheneisnotverylow,aninterpenetratingnetworkcanformduringtheannealingprocessathightemperatures(e.g.200oC)inthematerial,whichwillendowthematerialwithexcellentmechanical,electricalandgasbarrierproperties.Inthisstudy,morphologyevolutionofthenetworkstructureanditsinfluenceonthecrystallizationbehaviorofiPPwereinvestigatedbythemeansofopticalmicroscopy(OM)anddifferentialscanningcalorimetric(DSC).TheOMexperimentalresultsshowedthatthemeltcrystallizationrate,thecrystallizationmorphology,andthesizeofiPPcrystalsweresignificantlyinfluencedbythepresenceofgrapheneduetotheheterogeneousnucleationeffect.Itwasobservedthatthepreferenceofnucleationmainlyattheinterface,almostalongwiththenetworklocation,andthesizeofthecrystalwassmallerinsizecomparedtotheconditioninpureiPP;DSCresultsindicatedthatthehalftimeofcrystallization(t1/2)decreasedastheincreaseofthefillerloading.

作者：

Songmei Zhao, Fenghua Chen ,Yingjuan Huang, Chuanzhuang Zhao, Jin-Yong Dong and Charles C. Han

上傳時(shí)間：

2012-11-28 16:13:09

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