Molecular motions in X-irradiated polycarbonate films

A new relaxation at 455K is induced in poled polycarbonate films by X-irradiation and is associated with the phenyl radicals produced due to the destruction of the carbonate linkages. The decrease in magnitude of the relaxation at 350K and its shift towards lower temperature on X-irradiation are attributed partly to the decrease in molecular weight due to destruction of the carbonate linkages, and partly to disorientation of the aligned dipoles.