Functional Aromatic Poly(1, 3, 4-Oxadiazole-Ether)s with Benzimidazole Pendants: Synthesis, Thermal and Dielectric Studies. (8th October 2014)

• Record Type: Journal Article
• Authors: Ganesh, Shimoga D.; Pai, Vasantakumar K.; Kariduraganavar, Mahadevappa Y.; Jayanna, Madhu B.
• Other Names: Dias Anderson Academic Editor.
• Is Part Of: ISRN obstetrics and gynecology. Volume 2014(2014)
• Publication Date: 2014-10-08
• Subjects: Obstetrics -- Periodicals; Gynecology -- Periodicals; Pregnancy Complications; Genital Diseases, Female; Gynecology; Obstetrics; Electronic journals; Periodical; Periodicals; Fulltext; Internet Resources; Periodicals; 618.2
• DOI: 10.1155/2014/790702
• Languages: English
• ISSNs: 2090-4436

Abstract

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 ( Mw/Mn = 2.07 ) . All the synthesized polyethers were compressed into pellets and electrical contacts were established to perform dielectric properties.