Preparation and characterization of doped polybenzidine

The polybenzidine has been synthesized by thermal method and characterized by X-ray diffraction and infrared absorption studies. Further. polybenzidin e has been doped with nitrate. sulfate and acetate ions. The electrical con ductivity behavior of doped and undoped polybenzidine has been studied for various concentrations, of dopants between room temperature and 200 degrees C. All these polymers were found to behave like semiconductors. The activat ion energies of all the samples within the semiconducting region are estima ted and analysed with the variation in dopant concentration. The results an explained with the effective charge formation due to ion pair association.