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Validation of cogswell's convergent flow analysis
Author(s) -
Revenu Pascale,
Guillet Jacques,
Carrot Christian,
Arsac Alain
Publication year - 1996
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/(sici)1097-4628(19961212)62:11<1783::aid-app2>3.0.co;2-m
Subject(s) - shear (geology) , extensional definition , shear flow , mechanics , shear rate , materials science , thermodynamics , range (aeronautics) , physics , geology , rheology , composite material , paleontology , tectonics
The behavior of two polymers, namely, low‐density and linear low‐density polyethylenes, was studied in transient and steady‐state shear and elongational flows. The predictions of Wagner's model with a damping function using a generalized invariant were calculated. The model appears to be suitable for predictions of the shear and elongational transient flows on the range of strains experimentally tested. The shear flow curves can also be recovered by the model on a very broad range of shear rates. The model is then used to assess extensional data obtained with the convergent flow analysis proposed by Cogswell. © 1996 John Wiley & Sons, Inc.