VTF to Arrhenius Crossover in Temperature Dependence of Conductivity in $(PEG)_xNH_4ClO_4$ Polymer Electrolyte

Binesh, Nader and Bhat, SV (1998) VTF to Arrhenius Crossover in Temperature Dependence of Conductivity in $(PEG)_xNH_4ClO_4$ Polymer Electrolyte. In: Journal of Polymer Science, Part B, 36 (7). pp. 1201-1209.

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Abstract

We have studied the temperature variation of conductivity and $^1H$ NMR linewidth of $(PEG)_xNH_4ClO_4$ (x = 20, 30, 46, 100, 200, & 1000) polymer electrolyte systems. The temperature dependence of the conductivity shows two distinct behaviors, the low temperature VTF dependence crossing over to Arrhenius dependence at higher temperatures. The departure from the VTF behavior is found to be composition dependent. NMR spectra indicate the presence of large fractions of crystalline regions that start to melt around the crossover temperature. We understand the deviation from the VTF behavior as a consequence of this crystalline to elastomer transition.

Item Type:	Journal Article
Publication:	Journal of Polymer Science, Part B
Publisher:	Wiley
Additional Information:	Copyright of this article belongs to Wiley.
Keywords:	Polymer electrolytes;NMR;Conductivity;Glasses;Arrhenius and VTF dependences
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	07 Dec 2006
Last Modified:	19 Sep 2010 04:33
URI:	http://eprints.iisc.ac.in/id/eprint/9059

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