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Diffusion of organic penetrants through low density polyethylene (LDPE) films: Effect of size and shape of the penetrant molecules
Author(s) -
Saleem M.,
Asfour AbdulFattah A.,
De Kee D.,
Harrison Brian
Publication year - 1989
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.1989.070370303
Subject(s) - penetrant (biochemical) , low density polyethylene , toluene , hexane , dichloromethane , cyclohexane , polyethylene , xylene , materials science , chloroform , molecule , benzene , diffusion , chemistry , polymer chemistry , analytical chemistry (journal) , organic chemistry , thermodynamics , solvent , physics
The diffusion coefficient at zero penetrant concentration D 0 of dichloromethane, chloroform, carbon tetrachloride, cyclohexane, benzene, o‐xylene, m ‐xylene, and p ‐xylene, and n ‐hexane in LDPE were measured at 25°C, using the desorption method. The D 0 values obtained in this way are correlated with the size, shape, and chemical nature of the penetrant molecules. The temperature dependence of the diffusion coefficients of toluene and n ‐hexane in LDPE are also reported in the limited temperature range of 25–45°C. It indicates that, in spite of a size larger than that of toluene, n ‐hexane has a lower activation energy of diffusion.