PHOSPHORESCENCE DEPOLARIZATION MEASUREMENTS OF SEGMENTAL RELAXATION PROCESSES IN POLY(METHYL ACRYLATE) AND POLY(METHYL METHACRYLATE)

This short communication constitutes a preliminary report of the studies of transitions in bulk polymers using phosphorescence techniques. In particular the authors present segmental-relaxation-time data measured by steady-state phosphrescence depolarization measurements on labeled poly(methyl acrylate) and poly(methyl methacrylate). Experimental data are presented and evaluated. It is pointed out that the phosphorescence depolarization is a useful technique for the study of relaxation in bulk polymers. The method can be used to supplement and augment data accrued using more conventional techniques.