Creep experiments in uniaxial extension have been performed to explore the kinetics of the physical aging process in semi-crystalline sPS. Classical time-aging time superposition behavior was found for temperatures from 70 to 95 °C, with the shift rate μ decreasing as temperature increased. Virtually no aging was seen at 95 °C, the DSC determined TG. This behavior was atypical for a semi-crystalline polymer and reminiscent of the behavior of glassy amorphous thermoplastics. Some evidence for a separate crystalline aging mechanism which appears above TG is seen in experiments at 100 °C. Further investigation is required to confirm this.
|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