Table of Contents Author Guidelines Submit a Manuscript
Journal of Materials
Volume 2016, Article ID 7271959, 10 pages
http://dx.doi.org/10.1155/2016/7271959
Research Article

Thermal and Dielectric Behavior Studies of Poly(Arylene Ether Sulfone)s with Sulfonated and Phosphonated Pendants

1Department of Industrial Chemistry, School of Chemical Sciences, Jnana Sahyadri, Kuvempu University, Shankaraghatta, Shimoga, Karnataka 577 451, India
2Centrum Polymerních Systémů, Univerzita Tomáše Bati ve Zlíně, Univerzitní Institut, Třída Tomáše Bati 5678, 760 01 Zlín, Czech Republic
3Department of Chemistry and Center of Excellence in Polymer Science, Karnatak University, Dharwad 580 003, India
4Department of Physics, Government Science College, Chitradurga, Karnataka 577501, India

Received 28 April 2016; Revised 4 July 2016; Accepted 26 July 2016

Academic Editor: Matjaz Valant

Copyright © 2016 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

The present paper discusses the aspects of the synthesizing valeric acid based poly(ether sulfone)s with active carboxylic acid pendants (VALPSU) from solution polymerization technique via nucleophilic displacement polycondensation reaction among 4,4′-dichlorodiphenyl sulfone (DCDPS) and 4,4′-bis(4-hydroxyphenyl) valeric acid (BHPA). The conditions necessary to synthesize and purify the polymer were investigated in some detail. The synthesized poly(ether sulfone)s comprise sulfone and ether linkages in addition to reactive carboxylic acid functionality; these active carboxylic acid functional groups were exploited to hold the phenyl sulphonic acid and phenyl phosphonic acid pendants. The phenyl sulphonic acid pendants in VALPSU were easily constructed by altering active carboxylic acid moieties by sulfanilic acid using N,N′-dicyclohexylcarbodiimide (DCC) mediated mild synthetic route, whereas the latter one was built in two steps. Initially, polyphosphoric acid condensation with VALPSU by 4-bromoaniline and next straightforward palladium catalyzed synthetic route, in both of which acidic pendants are clenched by polymer backbone via amide linkage. Without impairing the primary polymeric backbone modified polymers were prepared by varying the stoichiometric ratios of respective combinations. All the polymers were physicochemically characterized and pressed into tablets; electrical contacts were established to study the dielectric properties. Finally, the influence of the acidic pendants on the dielectric properties was examined.