CORRELATION BETWEEN THE ELECTROCHEMICAL SYNTHESIS CONDITIONS AND THE OPTICAL-PROPERTIES OF POLYPYRROLE

A study of the optical properties of free standing polypyrrole films e lectrochemically prepared with different electrolyte types is presente d. Specular reflectance measurements were performed by FTIR spectrosco py in the range 200-6000 cm(-1). The optical constants for polypyrrole films were calculated from the reflectance spectra with Kramers-Kroni g technique. The effects of the thermal annealing, in the temperature range 373-423 K, on the reflection spectra of polypyrrole doped with p -toluenesulfonate were investigated. The changes of the reflectance an d d.c. conductivity after thermal annealing are discussed in terms of the correlation with the conformational defects of the polymer chains.