Macromolecular Research

The Polymer Society of Korea (한국고분자학회)
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Effect of Chromium Chloride on the Mechanical and Dielectric Properties of EPDM Rubber

  • Salem, M.A. (Physics Department, Faculty of Science, Azhar University) ;
  • Khaled, M.A. (Physics Department, Faculty of Science, Azhar University) ;
  • Hussein, A.M. (Physics Department, Faculty of Science, Azhar University) ;
  • Elway, E. (Physics Department, Faculty of Science, Cairo University)
  • Published : 2003.08.31
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Abstract

Measurements of Young's modulus, dielectric loss and a.c. conductivity have been carried out on EPDM rubber samples loaded with different concentrations of $CrCl_3$ (0,2,4 and 6 phr). The values of Young's modulus was found to be linearly dependent on the $CrCl_3$ content. Variation of the dielectric loss with temperature showed that $CrCl_3$ may act as plasticizer. However, at higher frequencies the dielectric loss was found to be independent of frequency and the rubber samples may behave as non-polar dielectric. Investigations of the a.c conductivity suggested that the conduction in these rubber samples can be described by small polaron tunneling. In addition, conductivity was found to increase with $CrCl_3$ content.

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