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Transient response in nonlinear region of molten polymers subjected to a sudden imposition of constant shear stress or constant electric field
Author(s) -
La Mantia F. P.,
Acierno D.
Publication year - 1980
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.1980.070250403
Subject(s) - nonlinear system , constant (computer programming) , transient (computer programming) , electric field , mechanics , materials science , shear (geology) , shear stress , field (mathematics) , stress (linguistics) , time constant , phenomenological model , composite material , physics , condensed matter physics , mathematics , engineering , computer science , electrical engineering , linguistics , philosophy , quantum mechanics , pure mathematics , programming language , operating system
Experimental transient results in the nonlinear region are reported for a commercial polyisobutylene subjected to sudden imposition of either a constant shear stress or a constant electric field. Some steady‐state results, eventually obtained in different types of experiments, are also considered. In both cases, a model analysis is presented that accounts for the nonlinear effects through changes in the free volume depending upon the applied stress. The good comparison between theoretical predictions and experimental results seems to indicate that the phenomenological approach advanced here is very promising.