ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Oxidative polymerization of anilinium 5-sulfosalicylate with peroxydisulfate in water

Budimir Marjanović, Ivan Juranić, Slavko Mentus, Gordana Ćirić-Marjanović, and Petr Holler

Centrohem, Vuka Karadžića bb, 22300 Stara Pazova, Serbia

E-mail: cenhem@verat.net

Abstract: Anilinium 5-sulfosalicylate was prepared and characterized by elemental analysis, and FTIR and NMR spectroscopies. It was polymerized in an aqueous solution using ammonium peroxydisulfate as an oxidant. The precipitated polyaniline 5-sulfosalicylate exhibited high thermal stability and conductivity of 0.13 S cm⁻¹. Its mass-average molar mass and polydispersity index were determined by gel-permeation chromatography as 22,900 g mol⁻¹ and 2.7, respectively. Elemental analysis and FTIR spectroscopy study of polyaniline 5-sulfosalicylate revealed the doping level and the oxidation state between emeraldine and protoemeraldine salt while corresponding studies of the polyaniline base indicate a small extent of the covalent bonding of 5-sulfosalicylate anions to polyaniline chains.

Keywords: anilinium 5-sulfosalicylate - peroxydisulfate - oxidative polymerization - conducting polymer - Polyaniline

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-010-0064-0

Chemical Papers 64 (6) 783–790 (2010)