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.
|Number of pages||5|
|Journal||Journal of Engineering and Applied Science|
|State||Published - 1996|
|Event||Proceedings of the 1996 54th Annual Technical Conference. Part 2 (of 3) - Indianapolis, IN, USA|
Duration: May 5 1996 → May 10 1996