Search Results - "Vrentas, JS"

Evaluation of the free-volume theory of diffusion by Vrentas, J. S., Vrentas, C. M.

“…General characteristics of the free‐volume theory of diffusion are discussed, and a recent data‐theory comparison involving free‐volume theory is critically…”
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Predictive methods for self-diffusion and mutual diffusion coefficients in polymer–solvent systems by Vrentas, J.S., Vrentas, C.M.

“…Methods are presented for the prediction of solvent self-diffusion coefficients and mutual diffusion coefficients in polymer–solvent systems for the complete…”
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Theoretical Aspects of Ternary Diffusion by Vrentas, James S, Vrentas, Christine M

“…Four theoretical aspects of ternary diffusion are investigated. Restrictions imposed on the ternary diffusion process by the entropy inequality are formulated,…”
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Hysteresis Effects for Sorption in Glassy Polymers by Vrentas, J. S, Vrentas, C. M

“…A theory based on taking into account structural rearrangements of the polymer matrix is used to analyze hysteresis effects that have been observed during a…”
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Diffusion-controlled polymer dissolution and drug release by Vrentas, J. S., Vrentas, C. M.

“…A model is formulated for diffusion‐controlled polymer dissolution and simultaneous drug release for amorphous, uncrosslinked polymers. Calculated fractional…”
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Diffusion in glassy polymers by Vrentas, J. S., Vrentas, C. M.

“…Two versions of the free‐volume theory of diffusion are compared by considering differences in the predictions for the activation energy for the diffusion…”
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Solvent Self-Diffusion in Glassy Polymer-Solvent Systems by Vrentas, J. S, Vrentas, C. M

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Effect of the polymer glass transition on the chromatographic retention volumes by Vrentas, J. S., Vrentas, C. M.

“…Theoretical developments are presented that explain four experimental observations concerning the temperature dependence of chromatographic specific retention…”
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Solvent Self-Diffusion in Rubbery Polymer-Solvent Systems by Vrentas, J. S, Vrentas, C. M

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Comparison of free-volume theories by VRENTAS, J. S, VRENTAS, C. M, DUDA, J. L

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Steady viscoelastic diffusion by Vrentas, J. S., Vrentas, C. M.

“…A viscoelastic constitutive equation is derived for the diffusion flux of an infinitely dilute solute diffusing in a polymeric fluid under steady flow…”
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Prediction of the molecular-weight dependence of mutual diffusion coefficients in polymer-solvent systems by Vrentas, J. S., Vrentas, C. M.

“…The ability of a proposed theory to describe the molecular weight dependence of mutual diffusion coefficients for polymer–solvent systems is examined by…”
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Effect of Solvent Size on Solvent Self-Diffusion in Polymer−Solvent Systems by Vrentas, J. S, Vrentas, C. M, Faridi, N

“…The free-volume theory for solvent self-diffusion coefficients in polymer−solvent systems is modified to include a more general analysis of the effects of…”
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Effect of glass transition on the concentration dependence of self-diffusion coefficients by Vrentas, J. S., Vrentas, C. M.

“…The free‐volume theory of diffusion is used to predict the effect of the glass transition on the concentration dependence of the solvent self‐diffusion…”
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Exchange of stabilities for surface tension driven convection by Vrentas, J.S., Vrentas, C.M.

“…An analytical proof is presented showing that the marginal or neutral state for surface-tension-driven convection in infinite liquid layers is stationary so…”
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Sorption in glassy polymers by Vrentas, J. S, Vrentas, C. M

“…A model is proposed for analyzing sorption and volumetric behavior of glassy polymer-penetrant systems. It is shown that the proposed theory can predict…”
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Theoretical aspects of fiber spinning by Vrentas, J. S., Vrentas, C. M.

“…A new coordinate expansion based on a Taylor series is used to derive the one‐dimensional approximation to unsteady isothermal jet flows. The expansion…”
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Viscoelastic diffusion by Vrentas, J. S., Vrentas, C. M.

“…A constitutive equation is proposed for the viscoelastic diffusion flux, and this equation is used to calculate sorption curves for differential step‐change…”
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Prediction of mutual diffusion coefficients for polymer-solvent systems by Vrentas, J. S., Vrentas, C. M.

“…A new equation is proposed for relating solvent self‐diffusion coefficients and mutual diffusion coefficients for polymer–solvent systems. The formulation of…”
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Transport in nonporous membranes by Vrentas, J.S, Vrentas, C.M

“…A theory is developed for isothermal, steady-state transport of solutes and solvents in nonporous membranes in the absence of electrical effects. The proposed…”
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