Department of Mechanical and Materials Engineering, Universiti Kebangsaan Malayasia, 43600 UKM, Bangi, Selangor, Malaysia
FUEL CELL PLATE MATERIALS AND MANUFACTURE
FUEL CELL INSTITUTE
UNIVERSITI KEBANGSAAN MALAYSIA
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FUEL CELL PLATE MATERIALS AND MANUFACTURE FUEL CELL INSTITUTE UNIVERSITI KEBANGSAAN MALAYSIA |
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Microstructural image analysis and structure–electrical conductivity relationship of single- and multiple-filler conductive composites
Radwan Dweiri and Jaafar Sahari Department of Mechanical and Materials Engineering, Universiti Kebangsaan Malayasia, 43600 UKM, Bangi, Selangor, Malaysia Received 23 September 2007; revised 26 December 2007; accepted 6 February 2008. Available online 14 February 2008.
AbstractThe electrical conductivity of polypropylene/graphite (PP/G) composites and polypropylene/graphite/carbon black (PP/G/CB) was investigated in this paper. The conductivity experimental data of PP/G composites was correlated to theoretical models, which exist in the literature, and the results showed higher values of the exponent t compared to the expected typical values. Moreover, these analytical models were unable to describe the electrical behaviour for multiple-filler conductive composites such as PP/G/CB composites. A 2D computer simulation to numerically compute the electrical conductivity based on digital image analysis was found to be somewhat useful to describe the mechanism of conduction in PP/G/CB composites and to determine the critical factors in developing high electrically conductive composites. Keywords: A. Composites; B. Electrical properties; B. Modelling; D. Scanning electron microscopy
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