TRANSPORT-PROPERTIES OF POLYANILINE(PPA) CA BLENDS/

Polyaniline protonated with phenyl phosphonic acid was blended with ce llulose acetate to produce composites with remarkably low conduction t hreshold p(c) less than or equal to 0.1%. As for generalized variable range hopping their conductivity follows: sigma = sigma(o) exp(-(T/T-o )(gamma)). The exponent gamma systematically increase with dilution fr om 0.5 at high concentration to 0.76 near the percolation threshold. T he thermal AC conductivity dependance has a scaling behaviour describe d by 1+ (omega/omega(o)(T))(s) with s close to 0.7. The conductivity d ata are obtained at variable frequency and temperature; they are compa red to theoretical models.