NISCAIR Online Periodicals Repository

Research Journals >
Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.48 [2010] >
IJPAP Vol.48(03) [March 2010] >

Title: Dielectric characterization of solution intercalation and melt intercalation poly(vinyl alcohol)-poly(vinyl pyrrolidone) blend-montmorillonite clay nanocomposite films
Authors: Sengwa, R J
Sankhla, Sonu
Choudhary, Shobhna
Keywords: Polymer-clay nanocomposites
Dielectric properties
Electrical conductivity
Impedance spectroscopy
Issue Date: Mar-2010
Publisher: CSIR
Abstract: Poly(vinyl alcohol) (PVA)-poly(vinyl pyrrolidone) (PVP) blend-montmorillonite (MMT) clay nanocomposite films up to 10 wt.% clay loading were synthesized by aqueous solution intercalation and melt compounding. Complex dielectric function, alternating current (ac) electrical conductivity and complex impedance of these films have been investigated as a function of clay concentration in the frequency range 20 Hz-1 MHz at 30°C. These films show significant decrease in the real part of relative dielectric function (') up to 3 wt. % MMT clay loading and at 5 wt.% their ' values are found to be nearly equal to the PVA-PVP blend film. It is observed that the e¢ values of PVA-PVP blend-MMT clay films are lower than the PVA-MMT clay film at the same clay concentration. The ac electrical conductivity of these films increases with increase of frequency. The dc conductivity of these films varies anomalously with increase of clay concentration. The complex impedance spectra suggest that the dielectric properties of these nanocomposite films are independent of electrode polarization effect in the experimental frequency range. A correlation between dielectric function, structural ordering and the effect of preparation route were explored by considering clay intercalation and exfoliation and the interactions between polymer and MMT clay. This study revealed that the dielectric constant values of these organic-inorganic nanocomposite films can be tuned by loading MMT clay in the polymers matrix, which also improves their physical and thermal properties.
Page(s): 196-204
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.48(03) [March 2010]

Files in This Item:

File Description SizeFormat
IJPAP 48(3) 196-204.pdf574.5 kBAdobe PDFView/Open
 Current Page Visits: 1796 
Recommend this item


Online Submission of Articles |  NISCAIR Website |  National Knowledge Resources Consortium |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2015 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 163561 since 01-Sep-2015  Last updated on 21-Jun-2016Webmaster: