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The measurement of the permeability of polymer membranes to solvating molecules
Author(s) -
Blackadder David A.,
Keniry John S.
Publication year - 1972
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.1972.070160825
Subject(s) - permeation , membrane , polymer , permeability (electromagnetism) , polyethylene , materials science , chemical engineering , xylene , vapor pressure , polymer chemistry , chemistry , organic chemistry , toluene , biochemistry , engineering
Methods previously used to measure the permeability of polymer membranes to solvating liquids and vapors have been reviewed. Experiments with polyethylene and several liquids, notably p ‐xylene, indicate that the various methods are not necessarily equivalent. The medium over which the membrane is supported and, more particularly, the nonpermeant pressure differential during permeation are shown to influence the permeation rate. Failure to appreciate this latter fact is believed to be the cause of previously reported anomalies concerning the effect of preswelling on permeation rate and the difference in permeation rate between a liquid and its saturated vapor.