Radiation Induced Variations of Electrical Conductivity in Polyaniline

Induced variations of electrical conductivity σ_dc of polyaniline by γ-radiation have been studied, σ_dcdc increases from 2.2 to 2.7S/cm due to radiation with a dose of 30-40Mrad. EPR results show that spin concentration increases at the same rate as σ_dc. The characteristics of σ_dc versus temperature fit to Inσ_dc∝T^-1 before irradiation, before irradiation, but to Inσ_dc∝T^-1/4 after irradiation.