INVESTIGATIONS ON THE EFFECT OF 5-SULFOSALICYLIC ACID ON THE PROPERTIES OF POLYANILINE

Results of the investigation of the chemical and electrochemical polymerization of aniline in 5-sulfosalicylic acid medium and its characterization by electrochemical and spectroscopic techniques are presented. The investigation reveals that 5-sulfosalicylic acid as a dopant not only enhances electrochemical stability of polyaniline at higher potentials but also yields a polymer which is soluble to the extent of 11 g/l in DMSO. The characterization of conducting polyaniline thus obtained was carried out by electronic and vibrational spectra, H-1 NMR in DMSO-d6, X-ray powder diffraction, thermal analysis and by electrochemical techniques.