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The Electrical Property of Polymer Matrix Composites Added Carbon Powder
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  • Journal title : Korean Journal of Materials Research
  • Volume 25, Issue 12,  2015, pp.678-682
  • Publisher : The Materials Research Society of Korea
  • DOI : 10.3740/MRSK.2015.25.12.678
 Title & Authors
The Electrical Property of Polymer Matrix Composites Added Carbon Powder
Shin, Soon-Gi;
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 Abstract
The electrical property of polymer matrix composites with added carbon powder is studied based on the temperature dependency of the conduction mechanism. The temperature coefficient of the resistance of the polymer matrix composites below the percolation threshold (x) changed from negative to positive at 0.20 < x < 0.21; this trend decreased with increasing of the percolation threshold. The temperature dependence of the electrical property(resistivity) of the polymer matrix composites below the percolation threshold can be explained by using a tunneling conduction model that incorporates the effect of the thermal expansion of the polymer matrix composites into the tunneling gap. The temperature coefficient of the resistance of the polymer matrix composites above the percolation threshold has a positive value; its absolute value increased with increasing volume fraction of carbon powder. By assuming that the electrical conduction through the percolating paths is a thermally activated process and by incorporating the effect of thermal expansion into the volume fraction of the carbon power, the temperature dependency of the resistivity above the percolation threshold can be well explained without violating the universal law of conductivity.
 Keywords
percolation threshold;polyethylene;carbon powder;composites;resistivity;
 Language
English
 Cited by
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