Doped polyanilines are prepared by contacting aniline with an oxidizing agent such as ammonium peroxydisulfate in aqueous solution at a temperature of at most about 10null C. in the presence of at least one organic sulfonic acid, preferably an alkylbenzenesulfonic acid such as dodecylbenzenesulfonic acid. The products may be blended with thermoplastic resins such as polystyrene to produce blends having excellent static discharge properties