Time, temperature and frequency viscoelastic behavior of commercial polymers [electronic resource] /

by Julius, Michael J.

Time, Temperature and Frequency Viscoelastic Behavior of Commercial Polymers Michael J. Julius This work involves an experimental investigation of creep behavior of commercial polymers with emphasis on characterizing the effects of physical aging, temperature, and frequency. The test specimens are cut from polymer samples that are used as encased liners in deteriorated sewer pipelines. The procedure for finding the shift rate, µ, is based on Struik’s protocol. Time- temperature superposition (TTSP) of shortterm data, at different temperatures, was done. The master curve obtained is shifted to the desired test temperature and desired initial age. Effective Time Theory (ETT) is used to find the effective time, ?, as a function of real time, t, from the master curve obtained by