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Rheological properties of structured fluids
Author(s) -
De Kee D.,
Chan Man Fong C. F.
Publication year - 1994
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760340510
Subject(s) - thixotropy , rheology , materials science , viscoelasticity , shear thinning , thermodynamics , shear modulus , shear rate , modulus , viscosity , dilatant , apparent viscosity , composite material , physics
The kinetic theory proposed by Soong and Liu for describing the rheological properties of structured fluids has been extended to predict shear‐thinning, shear‐thickening, thixotropy, and antithixotropy in different ranges of shear rates. Viscoelastic properties, as given by the Gordon‐Schowalter Maxwell model, with a non‐constant modulus, have also been considered. The theoretical predictions are compared with the predictions of a model used by Ait‐Kadi, et al. (1988), for a hydrolyzed polyacrylamide solution containing 20 g/1 of NaCl. the predictions and experimental data for the viscosity and primary normal stress coefficient are in reasonably good agreement. The stress growth functions have also been calculated and have been found to be consistent with experimental observations.