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Estimation of the effective permeability of thin surface layers created by exposure of polyethylene to fluorine
Author(s) -
Koros W. J.,
Stannett V. T.,
Hopfenberg H. B.
Publication year - 1982
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760221203
Subject(s) - polyethylene , materials science , penetrant (biochemical) , polymer , fluorine , permeability (electromagnetism) , composite material , surface layer , layer (electronics) , organic chemistry , chemistry , biochemistry , membrane , metallurgy
The significantly improved barrier properties of polyethylene, that, result from surface treatment with small amounts of fluorine are explained in terms of the reduced permeability of a thin layer produced by such treatments. Several approaches for correlating the permeabilities of the treated and untreated polymer layers to various penetrants are discussed. An analysis is also presented that permits estimation of the treatment depth corresponding to a given loss rate is related explicitly to the relative permeabilities of the penetrant in the treated and untreated polymer regions.