Elsevier

Synthetic Metals

Volume 68, Issue 3, February 1995, Pages 227-231
Synthetic Metals

Article
Percolation and dielectric relaxation in polypyrrole-Teflon alloys

https://doi.org/10.1016/0379-6779(94)02287-9Get rights and content

Abstract

Polypyrrole-polytetrafluoroethylene alloys were prepared and the complex permittivity was determined from d.c. to 6 GHz. An insulator-to-conductor transition occurs when increasing the polypyrrole volume fraction and is correctly fitted by a two-component mixing formula. A dielectric relaxation is observed and interpreted as the relaxation of charged-carrier hopping between localized states. The hopping model is in good agreement with the experimental results in the investigated range of alloy compositions.

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Cited by (14)

  • Electromagnetic reflection, shielding and conductivity of polypyrrole thin film electropolymerized in P-Tulensulfonic acid

    2011, Journal of Non-Crystalline Solids
    Citation Excerpt :

    Jousse et al. [16] obtained values of 110 and 600 for PPy blends with PVC at 10 GHz. A value of 90 and 460 respectively for ε′ and ε″ at 2 GHz has been reported for PPy-teflon composites (blends) [17]. The microwave conductivity of the PPY thin films deposited on stainless steel was calculated using the following equation σ = 2πfε0ε″, where σ — microwave conductivity, ε0 — permittivity of free space and ε″— dielectric loss.

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