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Flow behavior of polyacrylamide solution. III. Mathematical treatment
Author(s) -
Yang MuHoe
Publication year - 2001
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.2132
Subject(s) - polyacrylamide , rheology , arrhenius equation , thermodynamics , viscometer , shear rate , chemistry , virial coefficient , shear flow , materials science , polymer chemistry , viscosity , activation energy , organic chemistry , physics
The flow behavior of polyacrylamide solutions was systematically determined over a wide range of temperatures (20–50°C) and concentrations (20–50 ppm) by using a coaxial cylinder viscometer. The results indicated that the rheological behavior of low‐concentration polyacrylamide solution behaves similar to non‐Newtonian fluids at all these concentrations. The effect of temperature on the consistency coefficient and flow behavior index of polyacrylamide solution of the different concentrations followed an Arrhenius‐type relationship. Moreover, the effect of concentration on consistency coefficient and flow behavior index followed an exponential‐law relationship at the temperatures used. The rheological constants for the Arrhenius and exponential‐law models were determined. The combined effect of temperature and concentration on the coefficient of dynamic shear stress can be represented by a single equation: shear stress = 2.446 × 10 −7 exp(0.0639 C + 3613/RT)(shear rate) 2.337 exp(−0.00707C−245/RT) . © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 2784–2789, 2001