Self-diffusion in polymer-solvent-solvent systems

✍ Scribed by Vrentas, J. S. ;Duda, J. L. ;Ling, H.-C.

• Publisher: Wiley (John Wiley & Sons)
• Year: 1984
• Tongue: English
• Weight: 614 KB
• Volume: 22
• Category: Article
• ISSN: 0098-1273
• DOI: 10.1002/pol.1984.180220308

✦ Synopsis

Abstract

The ternary self‐diffusion data of Ferguson and von Meerwall are analyzed using a generalized form of the free‐volume theory of diffusion proposed by Vrentas and Duda. It is shown that the predicative capabilities of this form of the theory are satisfactory and comparable to those of the Fujita version. The lack of significant differences in the predictive capabilities of the two theories for the two ternary systems studied is explained in terms of the properties of the materials utilized. The data of Ferguson and von Meerwall are consistent with the hypothesis that the size of a polymer jumping unit is a fixed property of the polymer and that the jumping units for sufficiently large n‐paraffins are smaller than the entire solvent molecule.