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Molecular migration of aromatic liquids into a commercial fluoroelastomeric membrane at 30, 40, and 50°C
Author(s) -
Kulkarni Sangeeta B.,
Kariduraganavar Mahadevappa Y.,
Aminabhavi Tejraj M.
Publication year - 2003
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.13068
Subject(s) - chlorobenzene , sorption , permeation , materials science , gravimetric analysis , nitrobenzene , bromobenzene , diffusion , arrhenius equation , thermodynamics , benzene , chemical engineering , molecule , polymer chemistry , membrane , chemistry , analytical chemistry (journal) , activation energy , organic chemistry , biochemistry , physics , adsorption , engineering , catalysis
A study of sorption profiles and diffusion anomalies of benzene, methyl‐substituted benzenes, and other substituted benzenes (viz., chlorobenzene, nitrobenzene, bromobenzene, and anisole) into commercial fluoroelastomer (FC‐2450) was carried out by gravimetric method. The liquid sorption was studied at 30, 40, and 50°C and the results were analyzed in terms of Fick's diffusion equation. Liquid concentration profiles were also computed by using Fick's equation with the appropriate initial and boundary conditions and these are presented as a function of penetration depth of molecular migration and time of immersion. The temperature dependencies of sorption, diffusion, and permeation were used to compute the Arrhenius activation parameters and the results were discussed in terms of molecular size of liquids and interactions. Similarly, the diffusion coefficients and activation energies for diffusion exhibit systematic dependence on the size of the penetrant molecules and in some cases these are influenced by the interactions between the membrane and liquid molecules. The results reported here are useful in the applications of fluoroelastomer in hazardous waste chemical ponds and other similar situations. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3100–3106, 2003