A RELAY-DIFFUSION MODEL FOR THE TRANSPORT OF CHARGE GENERATED BY IONIZING-RADIATION IN POLYMERS

The kinetic laws of electric conductivity in polymers under conditions of continuous radiation-induced charge generation in the bulk are con sidered It is shown that the experimental results can be interpreted o n the basis of a relay-diffusion model of charge transport, according to which the charge is transferred between the local centers by means of molecular motions. A significant increase of the electric conductiv ity in polymers in the vicinity of the glass transition temperature is explained by participation of cooperative molecular motions in the ch arge transfer, which are accompanied by local structural rearrangement s and form the low-frequency region of the molecular relaxation spectr um.