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

Wolf, Clarence J.; Fu, Holly

doi:10.1002/(sici)1099-0488(19960115)34:1<75::aid-polb5>3.0.co;2-v

Cited by 25 publications

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“…Deborah numbers De m and De A characterize the physical properties of the polymer as well as the type of diffusion process. Figure 3 shows quantitative agreement between this model (Equations 16,18,19) and experimental data.…”

Section: Theories For Diffusion Through Polymer Compositessupporting

confidence: 65%

“…Thus, for swelling polymers, the elasticity of the polymer matrix and the existence of complex interfaces will decrease the mass flux. The time evolution of the polymer internal structural change, characterized by the conformation tensor m, can also be expressed by Equation (16). The corresponding free energy density ϕ is the one for the polymer-clay/solvent system.…”

Section: Theories For Diffusion Through Polymer Compositesmentioning

confidence: 99%

“…Both the induction period and the limiting solubility were strongly affected by the external stress while the diffusion rate was a weak function of stress. 16 Other studies reported that external stress, either uniaxial tensile stress or fabrication residual stress, produced an enhanced equilibrium solubility and an accelerated rate of diffusion, 158,166 however none of these studies performed the permeation or solubility experiments when the membranes were in the deformed state.…”

Section: Effect Of Mechanical Deformation On Permeationmentioning

confidence: 99%

“…15 The transport of a penetrant into a polymeric material can also be explained in terms of thermodynamics and kinetics. 16 The former is usually labelled as solubility or swelling and the latter as diffusion. The general question of solubility is usually formulated in terms of a solubility parameter, in a manner similar to that originally proposed by Hildebrand.…”

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confidence: 99%

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Viscoelastic (Non‐Fickian) Diffusion

2005

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This review paper deals with mass transport in macromolecular materials. The study of mass transport through polymeric composite materials for example has applications in a variety of areas such as coatings, packaging and gas separations, to name just a few. Here we discuss several models for diffusion as well as several experimental techniques. In particular, we discuss models for case II diffusion, from a continuum mechanics point of view as well as via a mesoscopic theory. Variables such as temperature, molecular structure and mechanical deformation, affecting mass transport are also discussed.

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Section: Theories For Diffusion Through Polymer Compositessupporting

confidence: 65%

Section: Theories For Diffusion Through Polymer Compositesmentioning

confidence: 99%

Section: Effect Of Mechanical Deformation On Permeationmentioning

confidence: 99%

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confidence: 99%

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Viscoelastic (Non‐Fickian) Diffusion

2005

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“…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.…”

Section: Introductionmentioning

confidence: 99%

Influence of external stress on the barrier properties of rubbers

Kée

Fong

et al. 1999

J. Appl. Polym. Sci.

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ABSTRACT:The effect of an external stress on the barrier properties of natural, bromobutyl, and nitrile rubber were studied using a modified ASTM permeation method. Stress-induced changes such as a decrease in the breakthrough time with mechanical elongation was observed. Upon application of a small mechanical deformation, little change was observed in terms of steady-state permeation flux. On the other hand, a stress-enhanced diffusion was observed for most of the solvent/rubber pairs studied.

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Effect of temperature and elongation on the liquid diffusion and permeation characteristics of natural rubber, nitrile rubber, and bromobutyl rubber

Kée

Fong

Pintauro

et al. 2000

J. Appl. Polym. Sci.

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The diffusive properties of acetone, dichloromethane, and toluene in natural, nitrile, and bromobutyl rubber membranes at temperatures between 273 and 313 K and uniaxial elongations between 0 and 40% were investigated. As the temperature and elongation increase, the steady state flux increases, and the breakthrough time decreases. An increase in temperature leads to an increase in permeability, and small extensions do not cause significant changes in the diffusive properties. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 1250–1255, 2000

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

Cited by 25 publications

References 0 publications

Viscoelastic (Non‐Fickian) Diffusion

Viscoelastic (Non‐Fickian) Diffusion

Influence of external stress on the barrier properties of rubbers

Effect of temperature and elongation on the liquid diffusion and permeation characteristics of natural rubber, nitrile rubber, and bromobutyl rubber

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