Stress enhanced sorption of water in poly(aryl ether ether ketone) [PEEK]

Reliability of an injection-moulded two-piece zirconia implant with PEKK abutment after long-term thermo-mechanical loading

“…Water absorption takes place by diffusion or capillary processes, for which increased operational temperature even within a range of 5-60°C, higher water-vapour pressure and applied external stress can significantly accelerate the water-absorption kinetics [60,61].…”

Transport behavior of carbon disulfide into poly aryl ether ether ketone

“…'-'' We have recently observed that applied stress or strain has a large effect on the transport process of several fluids in PEEK. [11][12][13] For example, toluene is readily absorbed by amorphous PEEK but crystalline PEEK appears to be impenetrable to toluene at room temperature. ' The transport process of toluene in PEEK has been classified as Case II.8 (For an excellent discussion of Case I1 or Supercase I1 sorption, see the review by Windle.14) One characteristic usually observed in Case I1 or Supercase I1 diffusion is that the penetrant advances through the glassy polymer as a sharp front rather than exhibiting a classical exponential-type profile.…”

Influence of external stress on the barrier properties of rubbers

“…More recently, strain-enhanced transport was also measured for toluene and water through poly(aryl ether ether ketone) (PEEK). 30,31 The effect of mechanical stress on the transport properties of several liquids through PVC and HDPE geomembranes was recently studied by Xiao et al 32 They found that a uniaxial tensile stress leads to a slight increase in the diffusion coefficients of liquid penetrants through PVC.…”