Experimental examinations of syntheses and physical properties of conducting polymer polyaniline controllably doped with sulfuric acid

Conducting polymers, as a prospective class of new materials, combine solubility, processability and flexibility of plastics with electrical and optical properties of metals and semiconductors. Polyaniline is one of the most important conducting polymers because of relatively low cost, successful combination of chemical and physical properties, as well as its numerous applications in practice. The distinctive property of polyaniline is its transition into conducting state by protonation of polymer chain. A simple transformation of the basic form, by treatment in dilute acid, increases electrical conductivity by nine orders of magnitude. In this experimental work, polyaniline has been synthesized by direct oxidation method at low temperature (0 degrees C) and have measured the electrical conductivity of conducting form of polyaniline (emeraldine salt) doped with sulfuric acid.