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The effect of temperature on physical aging of glassy polymers
Author(s) -
Drozdov Aleksey D.
Publication year - 2001
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.1787
Subject(s) - viscoelasticity , amorphous solid , vinyl acetate , glass transition , materials science , polymer , relaxation (psychology) , annealing (glass) , stress relaxation , methyl methacrylate , polymer chemistry , dynamic mechanical analysis , ultimate tensile strength , composite material , polyvinyl acetate , thermodynamics , chemistry , monomer , copolymer , creep , organic chemistry , physics , psychology , social psychology
Constitutive equations are derived for the linear viscoelastic response of amorphous glassy polymers subjected to physical aging. Stress–strain relations are applied to fit experimental data for poly(methyl methacrylate), poly(styrene‐ co ‐acronitrile), and poly(vinyl acetate) in tensile relaxation tests and in torsional dynamic tests at various temperatures. Fair agreement is demonstrated between observations and results of numerical simulation. It is revealed that an increase in the annealing temperature results in an increase in the rate of relaxation and a decrease in the apparent rate of structural recovery. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 81: 3309–3320, 2001