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An asymptotic analysis of polymer desorption and skinning
Author(s) -
Edwards David A.
Publication year - 1999
Publication title -
macromolecular theory and simulations
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 56
eISSN - 1521-3919
pISSN - 1022-1344
DOI - 10.1002/(sici)1521-3919(19990101)8:1<10::aid-mats10>3.0.co;2-q
Subject(s) - penetrant (biochemical) , skinning , desorption , polymer , viscoelasticity , natural rubber , materials science , chemistry , polymer chemistry , thermodynamics , composite material , adsorption , physics , organic chemistry , ecology , biology
During desorption of penetrant‐saturated polymers, a glassy skin can form at the exposed surface. The associated dynamics are not purely Fickian due to viscoelastic relaxation effects in the polymer. A model is presented which captures these nonlocal effects. The motion of the glass‐rubber interface and the accumulated desorbed flux are calculated. The model also describes trapping skinning, where an increase in the driving force reduces the amount of penetrant released.