Impedance spectroscopy of novel hybrid composite films of polyvinylbutyral (PVB)/functionalized mesoporous silica

Roy, Aashis S and Gupta, Satyajit and Seethamraju, Sindhu and Madras, Giridhar and Ramamurthy, Praveen C (2014) Impedance spectroscopy of novel hybrid composite films of polyvinylbutyral (PVB)/functionalized mesoporous silica. In: COMPOSITES PART B-ENGINEERING, 58 . pp. 134-139.

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Abstract

Polyvinyl butyral/functionalized mesoporous silica hybrid composite films have been fabricated by solution casting technique with various weight percentages of functionalized silica. A polyol (tripentaerythritol-electron rich component), which acts as an electron donor to the polymer backbone, was added to enhance the conductivity. The prepared composites were characterized by Fourier transformed infrared spectroscopy and the morphology was evaluated by scanning electron microscopy. Dielectric properties of these freestanding composites were studied using the two-probe method. The dielectric constant and impedance value decreased with the increase in applied frequency as well as with the increase in functionalized silica content in the polyvinyl butyral matrix. An increase in conductivity of the PVB/functionalized silica composites was also observed. (C) 2013 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	COMPOSITES PART B-ENGINEERING
Publisher:	ELSEVIER SCI LTD
Additional Information:	Copyright for this article belongs to the ELSEVIER SCI LTD,ENGLAND
Keywords:	Polymers; Thin Films; Dielectric properties; Transport properties
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	14 Mar 2014 10:18
Last Modified:	14 Mar 2014 10:18
URI:	http://eprints.iisc.ac.in/id/eprint/48620

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