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Dynamics of loosely crosslinked polymer networks
Author(s) -
Bueche F.
Publication year - 1959
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.1959.070010215
Subject(s) - materials science , polymer , creep , elongation , methacrylate , natural rubber , ultimate tensile strength , composite material , thermodynamics , polymer science , polymer chemistry , physics , copolymer
An ideal crosslinked rubber will reach an equilibrium elongation soon after a constant tensile stress has been applied to it. Actual materials never reach an equilibrium strain in many cases. This fact is clarified by studying the creep curves for molten polyethyl methacrylate crosslinked with varying amounts of ethylene dimethacrylate. A quantitative theory for the observed effects is presented. It shows that the slope of the long time portion of the creep curve is dependent primarily on a parameter which characterizes the number of effective chains emanating from a network branch point. Reasonable agreement between theory and experiment is found.