Journal of Materials Science

, Volume 33, Issue 12, pp 3085–3093

Polymer matrix composites: Conductivity enhancement through polypyrrole coating of nickel flake

  • W. B Genetti
  • W. L Yuan
  • B. P Grady
  • E. A O'rear
  • C. L Lai
  • D. T Glatzhofer
Article

Abstract

The electrical resistance of polymeric materials loaded with conductive fillers can be divided into three major categories: the intrinsic resistance of the filler and matrix, the particle–particle contact resistance, and the tunnelling resistance. A method for decreasing both the particle–particle contact and the tunnelling resistance in nickel-filled low-density polyethylene composites which involves coating the nickel with polypyrrole (PPy) using admicellar polymerization has been developed. It is believed that these resistances are reduced by the formation of PPy "molecular wires" which occur as a result of chain entanglements at high filler loadings. Coating the nickel particles with PPy leads to a three-order-of-magnitude increase in conductivity at concentrations well above the percolation threshold without significantly changing the thermal or mechanical properties of the composite. © 1998 Kluwer Academic Publishers

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Copyright information

© Chapman and Hall 1998

Authors and Affiliations

  • W. B Genetti
    • 1
  • W. L Yuan
    • 1
  • B. P Grady
    • 1
  • E. A O'rear
    • 1
  • C. L Lai
    • 1
  • D. T Glatzhofer
    • 2
  1. 1.School of Chemical Engineering and Materials ScienceThe University of OklahomaNormanUSA
  2. 2.Department of Chemistry and BiochemistryThe University of OklahomaNormanUSA

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