Geminate pairs and their role in radiation-induced conductivity of poly(methyl methacrylate)

Non-steady-state radiation-induced conductivity of poly(methyl methacrylate ) was studied at room and elevated temperatures. It was shown that the cond uctivity is due to electric polarization of geminate pairs. The evolution o f geminate pairs was rationalized in terms of the Rose-Fowler-Weisberg gene ralized model. The conclusions by the model were compared with the results of previous studies on the kinetics of formation and decay of geminate pair s upon pulse radiolysis or flash photolysis of doped poly(methyl methacryla te).