• 文献标题:   Enhancement of electrical and thermal conductivity of polypropylene by graphene nanoplatelets
  • 文献类型:   Article
  • 作  者:   AL IMRAN K, LOU JZ, SHIVAKUMAR KN
  • 作者关键词:   conducting polymer, extrusion, thermal propertie
  • 出版物名称:   JOURNAL OF APPLIED POLYMER SCIENCE
  • ISSN:   0021-8995 EI 1097-4628
  • 通讯作者地址:   North Carolina A T State Univ
  • 被引频次:   6
  • DOI:   10.1002/APP.45833
  • 出版年:   2018

▎ 摘  要

One of disadvantages of polymer composites is poor electrical and thermal conductivity. As a first step in this direction, graphene-modified polypropylene polymer is being developed to improve its electrical and thermal conductivity. Two techniques were investigated: surface coating and extrusion. In the case of coating technique, the percolation threshold was found to be 0.5 wt % of graphene and electrical conductivity of polypropylene increased around 13 log cycles. Coating technique breaks the agglomerations due to magnetic stirring followed by sonication and gives homogeneous graphene-coated polypropylene pellets. When polymer melts under compression molding, the graphene platelets network formed on the surface of polypropylene pellets as well as through-the-thickness of the molded disk, which provide continuous network of graphene. However, in extrusion technique, graphene segregated and did not disperse properly in polypropylene. (C) 2017 Wiley Periodicals, Inc.