Journal of Materials Science

, Volume 42, Issue 16, pp 6477–6488 | Cite as

Impedance and modulus spectra of the percolation system silicon–polyester resin and their analysis using the two exponent phenomenological percolation equation

  • Godfrey SautiEmail author
  • David S. McLachlan


The ac conductivity of silicon–polyester resin composites is found to be best fitted using the two exponent phenomenological percolation equation (TEPPE) (formerly known as the general effective media (GEM) equation). The results show that, with the actual experimentally measured components’ electrical properties as input, the TEPPE can be used to model and fit the composites’ complex conductivity data. The paper also highlights the importance of using several representations of the immittance spectroscopy data in order to correctly identify the various contributions, for instance the modulus plots clearly show the arcs due to the isolated percolation clusters, below the critical volume fraction.


Polyester Resin Percolation Cluster Conducting Component High Frequency Peak Pure Resin 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



GS would like to acknowledge financial assistance from the TW Khambule GOOT Fellowship at the University of the Witwatersrand.


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.School of Physics and Materials Physics Research InstituteUniversity of the WitwatersrandWitsSouth Africa
  2. 2.Department of Chemistry and Polymer ScienceStellenbosch UniversityMatielandSouth Africa

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