Diffusivity of solvent in a polymer solution-expansive free volume effect
Journal
European Polymer Journal
Journal Volume
41
Journal Issue
5
Pages
1036-1042
Date Issued
2005
Author(s)
Lin S.-H.
Abstract
The concentration dependency of the diffusivity of a solvent in a polymer solution is derived on the basis of a free volume theory. Applying a molecular kinetics approach, the Fujita-Doolittle equation is modified. The result of numerical simulation reveals that the diffusivity of solvent in a polymer solution depends largely on both the polymer chain structure and its concentration. The applicability of the analytical expression derived is justified by fitting the experimental data for n-alkyl acetate-(poly-methyl acrylate) polymer solutions in the literature. ? 2004 Elsevier Ltd. All rights reserved.
Subjects
Diffusivity of solvent
Expansive free volume
Fujita-Doolittle equation
Retardation effect
Thermal expansive coefficient
Type
journal article