TEMPERATURE EFFECT ON THE RADIATION-DEGRADATION OF POLY(METHYL METHACRYLATE)

摘要

G-value for γ-induced scission of main chains for authentically pure poly(methyl methacrylate) is 1.5. It ia independent of irradiation temperature below 273 K. It is remarkably affected below ca. 200 K by residual monomer or those produced by radiolysis. The temperature dependence of the G-value reported in previous papers is attributed to the monomer present in polymer samples.