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Non‐markovian diffusion processes in polymers and a stretched exponential relaxation constitutive equation
Author(s) -
Stastna J.,
De Kee D.,
Harrison B.
Publication year - 1994
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.1994.070540606
Subject(s) - viscoelasticity , constitutive equation , relaxation (psychology) , exponential function , diffusion , materials science , polymer , thermodynamics , polymer chemistry , physics , mathematics , mathematical analysis , composite material , psychology , finite element method , social psychology
Non‐Markovian diffusion transport in polymers was studied. Applying the results of various researchers, a stretched exponential relaxation function was obtained and a linear viscoelastic constitutive equation formulated. Frequency dependent material functions, obtained from this constitutive equation were studied and the results successfully compared with experimental data for polyethylene oxide solutions. Sorption kinetics in a polymeric film were also studied. © 1994 John Wiley & Sons, Inc.