PREPARATION OF POLYANILINE DOPED WITH DIFFERENT ORGANIC-ACIDS FROM PRECIPITATION POLYMERIZATION

Polyanilines doped with different organic acids were directly prepared by precipitation polymerization technique using water/acetone as the medium of reaction and dodecylbenzene sulfonic acid (DBSA) or dibutyln aphthalene sulfonic acid(DBNSA) as the organic acid. Optimum reaction parameters, such as polymerization temperature, reaction time, molar r atio of acid/aniline and (NH4)(2)S2Oepsilon/aniline, were obtained for the precipitation polymerization of aniline. Polymer yield was about 80%, Organic acid-doped PAn made in 2 L experiment scale showed a high conductivity (3, 0 S cm-l) and can be easily dissolved in common orga nic solvent, therefore, this precipitation polymerization technique sh ould be applied in industry. PAn-DBNSA is somewhat better than PAn-DBS A in properties.