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http://dx.doi.org/10.7234/kscm.2006.19.2.007

Electrical and the Mechanical Properties of Graphite particle/carbon fiber hybrid Conductive Polymer Composites  

Heo Seong-Il (포항공과대학교 기계공학과 대학원)
Yun Jin-Cheol (포항공과대학교 기계공학과 대학원)
Oh Kyung-Seok (포항공과대학교 기계공학과 대학원)
Han Kyung-Seop (포항공과대학교 기계공학과)
Publication Information
Composites Research / v.19, no.2, 2006 , pp. 7-12 More about this Journal
Abstract
Graphite particle/carbon fiber hybrid conductive polymer composites were fabricated by the compression molding technique. Graphite particles were mixed with an epoxy resin to impart the electrical conductivity in the composite materials. In this study, graphite reinforced conductive polymer composites with high filler loadings were manufactured to accomplish high electrical conductivity above 100S/cm. Graphite particles were the main filler to increase the electrical conductivity of composites by direct contact between graphite particles. While high filler loadings are needed to attain good electrical conductivity, the composites becomes brittle. So carbon fiber was added to compensate weakened mechanical property. With increasing the carbon fiber loading ratio, the electrical conductivity gradually decreased because non-conducting regions were generated in the carbon fiber cluster among carbon fibers, while the flexural strength increased. In the case of carbon fiber 20wt.% of the total system, the electrical conductivity decreased 27%, whereas the flexural strength increased 12%.
Keywords
electrical conductivity; flexural strength; high filler loadings; non-conducting region;
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