Dielectric properties of conducting polymer

Truong, V.T., Codd, A.R. and Forsyth, M. 1994, Dielectric properties of conducting polymer, Journal of materials science, vol. 29, no. 16, pp. 4331-4338.

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Title Dielectric properties of conducting polymer
Author(s) Truong, V.T.
Codd, A.R.
Forsyth, M.
Journal name Journal of materials science
Volume number 29
Issue number 16
Start page 4331
End page 4338
Publisher Springer
Place of publication New York, N.Y.
Publication date 1994
ISSN 0022-2461
1573-4803
Summary The dielectric properties of conducting polymer composites containing polypyrrole (PPy) crushed films, PPy powder, polyaniline (PAn) base and acid powders as the dispersants and silicone rubber and vinyl ester as matrix materials have been investigated in the frequency range 2-18 GHz. The dielectric parameters such as the real part, epsiprime, and imaginary part, epsiPrime, of the permittivity and loss tangent, tandelta, increase with increasing conductivity and concentration of the dispersant. The geometrical shape of the dispersant governs the ability of conductive network formation which is indicated by a large drop in the resistivity of the composite. Also, dispersant/matrix interactions and physical properties of the matrix influence the agglomeration of the dispersant phase which, in turn, affects the dielectric properties of the composites. Flakes of PPy obtained by crushing highly conductive films and large PAn powder aggregates were unable to form a conducting network. The composites without a network of dispersant exhibit low dielectric parameters. On the other hand, high values of tan delta ranging from 0.7–1.1 were achieved for the PPy powder (15 parts)/silicone rubber composites where a conducting network was observed.
Language eng
Field of Research 039999 Chemical Sciences not elsewhere classified
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©1994, Chapman & Hall
Persistent URL http://hdl.handle.net/10536/DRO/DU:30030281

Document type: Journal Article
Collection: Institute for Technology Research and Innovation
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