Dielectric Properties of Aligned Conducting Polymers

摘要

Attempts to align electrically conducting polypyrrole (PPy) were made usingvarious electrochemical methods. Rotating cylinder anode electropolymerization was found to induce partially aligned deposits of PPy films when they were prepared in the presence of a soap supporting electrolyte or a soluble polymer additive. Degrees of dc electrical anisotropy up to 60 to 1 were observed. SEM and UV-vis results indicated that soluble pyrrole oligomers generated in the rotating anode cell result in film alignment. Electrochemically prepared PPy/poly(ethylene oxide) composites were stretchable, resulting in conductivity enhancement, but with little electrical anisotropy. Pyrrole electropolymerization in a magnetic field was also evaluated, but electrical anisotropy was not detected in any of the films. However, an unusual uniform rotational hydrodynamic motion, depending on the deposition and polarity of the electrodes, was observed with submersed electrodes in which the electric field was parallel to the magnetic field.