Electrical conductivity studies of poly(ethyleneoxide)-poly(vinylalcohol) blends

Mishra, Rachna and Rao, KJ (1998) Electrical conductivity studies of poly(ethyleneoxide)-poly(vinylalcohol) blends. In: Solid State Ionics, 106 (1-2). pp. 113-127.

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Abstract

The electrical conductivity studies have been conducted over the entire range of composition in poly(ethyleneoxide)- poly(vinylalcohol) blends over a wide frequency regime. The conductivity variation has been investigated using the modified Almond-West formulation of $\sigma(w) = A , w^s^,+ A_2w^s2$ for different compositions and is found to fit the ac conductivity data better at all temperatures. The dielectric data were analysed using complex dielectric constant $\epsilon^*$. complex electric modulus M*. and complex impedence Z* of the samples. The relaxation peaks seen in the imaginary part of the moduli for pure PEO and pure PVA occur at different frequencies but dielectric relaxation spectroscopic studies do not reveal the simultaneous presence of both the peaks in any of the blends. The residual water is thought to play a role in suppressing the two peak character.

Item Type:	Journal Article
Publication:	Solid State Ionics
Publisher:	Elsevier
Additional Information:	Copyright of this article belongs to elsevier.
Keywords:	Blends;Poly(ethyleneoxide);Poly(vinylalcohol);Electrical conductivity;Dielectric relaxation spectroscopy (DRS)
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	08 Jan 2007
Last Modified:	19 Sep 2010 04:33
URI:	http://eprints.iisc.ac.in/id/eprint/9334

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