Table of Contents
International Scholarly Research Notices
Volume 2014, Article ID 790702, 8 pages
http://dx.doi.org/10.1155/2014/790702
Research Article

Functional Aromatic Poly(1,3,4-Oxadiazole-Ether)s with Benzimidazole Pendants: Synthesis, Thermal and Dielectric Studies

1Department of Industrial Chemistry, School of Chemical Sciences, Jnana Sahyadri, Kuvempu University, Shankaraghatta, Shimoga, Karnataka 577 451, India
2Department of Chemistry and Center of Excellence in Polymer Science, Karnatak University, Dharwad 580 003, India
3Department of Physics, Government Science College, Chitradurga, Karnataka 577501, India

Received 21 April 2014; Accepted 25 June 2014; Published 8 October 2014

Academic Editor: Anderson Dias

Copyright © 2014 Shimoga D. Ganesh et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Poly(1,3,4-oxadiazole-ether) with reactive carboxylic acid pendants was synthesized from solution polymerization via nucleophilic displacement polycondensation among 2,5-bis(4-fluorophenyl)-1,3,4-oxadiazole (BFPOx) and 4,4′-bis(4-hydroxyphenyl) valeric acid (BHPA). Without altering the polymeric segments, benzimidazole modified poly(1,3,4-oxadiazole-ether)s were prepared by varying stoichiometric ratios of 1,2-phenylenediamine. The molecular structural characterization of these polymers was achieved by, FT-IR, NMR, TGA, elemental analysis, and analytical techniques. The weight-average molecular weight of virgin polymer with carboxylic acid functionality was determined by gel permeation chromatography (GPC) and was found to be 22400 . All the synthesized polyethers were compressed into pellets and electrical contacts were established to perform dielectric properties.