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Stress-enhanced transport of toluene in poly aryl ether ether ketone (PEEK)

✍ Scribed by Clarence J. Wolf; Holly Fu

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
592 KB
Volume
34
Category
Article
ISSN
0887-6266

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✦ Synopsis

The transport of fluids in the semicrystalline polymer, poly(ary1 ether ether ketone) (PEEK), was investigated. Both solubility and rate of penetration of toluene into PEEK are markedly increased by the application of an external stress. The induction period (i.e., the time for the sorption to begin) is a function of applied stress as well as temperature and crystallinity. At 22Β°C in 29% crystalline PEEK the induction period was reduced from more than 2000 h to approximately 10 h whereas the solubility of toluene was increased from 9 to 44 wt % upon the application of an external tensile stress of 30 MPa. A critical stress (i.e., a stress value below which the stress-enhanced effects are not observed) was determined. The critical stress is a strong function of crystallinity and temperature.

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