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Temperature–strain rate transformations with isotactic polypropylene at finite strains
Author(s) -
Hall I. H.
Publication year - 1964
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.1964.070080407
Subject(s) - tacticity , superposition principle , materials science , strain (injury) , polypropylene , stress (linguistics) , time–temperature superposition , stress–strain curve , composite material , mathematical analysis , mathematics , polymer , deformation (meteorology) , polymerization , biology , linguistics , philosophy , anatomy
The possibility of applying Ferry's superposition principle to the entire stress‐strain curve of oriented isotactic polypropylene is studied. Sufficient data to prove the applicability of the principle is not available, but from published information it is shown that if superposition is valid for this material, then the shift factors are independent of strain and apply to the breaking extension as well as points along the stress–strain curve.