THE ROLE OF MOLECULAR MOBILITY IN THE TRA NSFER OF CHARGE GENERATED BY IONIZING-RADIATION IN POLYMERS

The dependence of radiation-induced electrical conductivity on the irr adiation time and temperature was studied for a number of polymers, Th e character of variation of radiation-induced conductivity with time a nd temperature correlates with the physical state of a polymer. ''Defr eezing'' of the segmental mobility in the region of cx-relaxation tran sition leads to a sharp change in radiation-induced conductivity, and the appearance of peaks in the kinetic curves and break points on the Arrhenius plots in conductivity versus temperature coordinates. Molecu lar mobility plays a determining role in the transfer of charge carrie rs generated by radiation. This conclusion agrees with the data on the carrier mobility obtained by the time-of-flight methods.