A STUDY OF LANGMUIR AND LANGMUIR-BLODGETT-FILMS OF POLYANILINE

Formation of a stable monolayer of polyaniline (EB) at the air-water i nterface has been obtained, employing N-methylpyrrolidone (NMP) as pro cessing solvent. Surface pressure-mean molecular area isotherm and com pressibility of the polyaniline monolayer were studied under different subphase conditions such as the subphase temperature, the subphase pH , and the nature of counterions in the subphase. The mean molecular ar ea found and compressibility results have been interpreted in terms of the rigidity of the polymer chains at the air-water interface. Furthe r, polyaniline monolayers have been transferred onto different substra tes and the multilayers were characterized by spectroscopic, electrica l, and electrochemical techniques. The Langmuir-Blodgett multilayers w ere also deposited at different surface pressures. The transfer behavi or and the electrochemical characteristics of these films indicate dif ferences in their packing arrangement.