Gamma relaxation in nitric acid-treated polyethylene single crystals

Publisher Website
Google Scholar
Abstract
There has recently been considerable interest in the gamma relaxation of polyethylene (PE). Determined by dynamic mechanical measurements at 1 cps, this relaxation would be located near 150°K. The gamma loss peak has been observed both in bulk PE [1-5] and in mats of solution-grown crystals [5-8] by a variety of techniques. The origin of this relaxation has variably been attributed to the amorphous component [1-6,9,10], the crystalline component [8,11], or both [12,13]. According to the last view, the gamma relaxation consists of two superposed peaks (γa and γc) attributable, respectively, to the two components.