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Diffusion and sorption of organic liquids through polymer membranes. I. Polyurethane versus n ‐alkanes
Author(s) -
Khinnavar R. S.,
Aminabhavi T. M.
Publication year - 1991
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1991.070420823
Subject(s) - sorption , polyurethane , diffusion , thermal diffusivity , membrane , polymer , fick's laws of diffusion , molar mass , materials science , polymer chemistry , permeation , chemical engineering , thermodynamics , chemistry , organic chemistry , composite material , adsorption , biochemistry , physics , engineering
Sorption and diffusion studies of n ‐alkanes through a commercial polyurethane membrane have been investigated in the temperature interval of 25–60°C. Liquid diffusivity through polyurethane was measured by using the immersion/weight gain method and the diffusion mechanism was explained in terms of the Fickian model. The activation energies of sorption and diffusion processes have been estimated and used to investigate the thermodynamic interactions between polyurethane chains and n ‐alkanes. Furthermore, sorption data were used to estimate the molar mass between crosslinks of the network polymer.