PERCOLATION TRANSITION IN CONDUCTING POLYMER NETWORKS

A percolation model for conducting polymers is proposed in terms of a random resister network. The macroscopic conductivity at the critical polymer density is studied, Substantial deviations have been detected from the standard conducting behavior in percolating structures genera ted with a large difference between inter- and intrachain conductance elements. This behavior could be explained in terms of a distinctive f inite-size effect and the relevance of the results discussed in contex t with real polymer systems.