Network formation and crystallization behavior of the in-situ prepared isotatic polypropylene/graphene composites，第十届高分子物理国际研讨会（PP’2012)(2012.6.4~8，成都）-中国聚合物网,论文下载

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

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分子表征

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第十届高分子物理国际研讨会（PP’2012)(2012.6.4~8，成都）

简介：

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

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2012-11-28 16:13:09

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