METHOD FOR MAKING POLYANILINE WITH HIGH MOLECULAR MASS IN THE FORM OF EMERALDINE AND POLYANILINE OBTAINED BY SAID METHOD

摘要

The invention concerns a method for making polyaniline with high molecular mass in the form of emeraldine and polyaniline obtained by said method. The method comprises the following steps: a) polymerising the aniline or aniline derivative into pernigraniline, by carrying out the polymerisation in an aqueous homogeneous solution comprising the aniline or aniline derivative, a protonic acid, a salt, an oxidizing agent and ethanol to obtain a pernigraniline; b) reducing the resulting pernigraniline in step a) into emeraldine by means of an aqueous reducing solution not containing aniline; and optionally a complementary step for extracting and post-polymerising with chloroform. The resulting polyanilines protonated with sulphonic (+/-)-10-camphor acid are completely soluble in m-cresol and in hexafluoroisopropanol and produce flexible films with high electrical conductivity, 250-350 S/cm.