SPECTRAL AND ELECTROCHEMICAL PROPERTIES OF EVAPORATION-DEPOSITED POLYANILINE

A method for preparation of polyaniline films by thermal vacuum evapor ation is presented. Spectral investigations, as well as potentiodynami c measurements, on such layers were carried out. It was inferred from the data that the second oxidation stage (which corresponds to a trans ition from emeraldine to pemigraniline) for the evaporation-deposited polyaniline layers is absent. Such behavior would originate from the d efects of the evaporation-deposited polyaniline molecular structure, n amely, from small sizes of the polymer molecules and disruption of the head-to-tail alternation of monomer units that is typical for alterna tive methods of preparation of polyaniline layers.