ELECTRICAL-CONDUCTIVITY OF STRETCHED POLYPYRROLE FILM

Abstract

Polypyrrole films with high conductivity and stretchability were synthesized by an electrochemical method in acetonitrile solution at low temperature and low current density. The films were stretched to over twice their original length. The variation of stretching direction conductivity (sigma1) for a stretched film was evaluated directly by in situ measurements of resistance and strain during the stretching of the polypyrrole film. The calculated values of sigma1 agreed very well with experimental conductivity data measured by the four-probe technique after drying in air.