Large deformation response of polycarbonate: Time-temperature and time-aging time superposition

P. A. O'Connell, G. B. McKenna

Research output: Contribution to journalConference articlepeer-review

Abstract

Time-temperature superposition was applied to polycarbonate at 2% torsion over the range 30 °C-135 °C. The Kohlrausch-Williams-Watts (KWW) function was not valid over timescales greater than approximately 4 decades, although it was still a useful tool for comparing data over shorter timescales and at temperatures that are sufficiently close (such that the β term in the KWW equation does not change significantly). In addition to the change in timescale of the relaxation response at different temperatures and aging times, there was also a change in the zero time or intrinsic stiffness, with the material becoming inherently stiffer at lower temperatures and longer aging times.

Original languageEnglish
Pages (from-to)2262-2266
Number of pages5
JournalJournal of Engineering and Applied Science
Volume2
StatePublished - 1996
EventProceedings of the 1996 54th Annual Technical Conference. Part 2 (of 3) - Indianapolis, IN, USA
Duration: May 5 1996May 10 1996

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