NEW POSSIBILITIES FOR THE STUDY OF DEFORMATION KINETICS AND RELAXATIONS IN POLYMERS USING A LASER INTERFEROMETER

An original precise technique for measuring creep rate using a laser i nterferometer has been developed. This makes it possible to obtain inf ormation on creep kinetics at any point on the creep curve over wide r anges of temperatures and deformation values. Some regularities in the deformation kinetics of glassy polymers have been found. The relation ships obtained between activation energy and activation volume, and co hesion energy confirm the intermolecular origin of the potential barri ers to deformation. The possibilities of studying microplasticity in d ifferent materials, including brittle materials, have been demonstrate d. On this basis, the Creep Rate Spectra (CRS) method is suggested as a low-frequency and high-resolution procedure for application in relax ation spectrometry.