• 文献标题:   Graphene Network Organisation in Conductive Polymer Composites
  • 文献类型:   Article
  • 作  者:   SYURIK YV, GHISLANDI MG, TKALYA EE, PATERSON G, MCGROUTHER D, AGEEV OA, LOOS J
  • 作者关键词:   charge contrast sem, conductive network organization, dc conductivity, graphene composite, morphology
  • 出版物名称:   MACROMOLECULAR CHEMISTRY PHYSICS
  • ISSN:   1022-1352 EI 1521-3935
  • 通讯作者地址:   Univ Glasgow
  • 被引频次:   29
  • DOI:   10.1002/macp.201200116
  • 出版年:   2012

▎ 摘  要

A latex technique is used to prepare graphene/polystyrene and graphene/poly(propylene) composites with varying GR loadings. Their electrical properties and the corresponding volume organisation of GR networks are studied. Percolation thresholds for conduction are found to be about 0.9 and 0.4 wt% for GR/PS and GR/PP with maximum obtained conductivities of 12 and 0.4 S m-1 for GR loadings of 2 wt%, respectively. Investigations using SEM and electrical conductivity measurements show that for the preparation conditions used GR forms an isotropic 3D network in the PS matrix, but GR forms a 2D network in the PP matrix. The different GR network organisations are possibly forced by the different melt flow behaviour of the matrix polymers during processing and the subsequent crystallisation of PP.