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Concentration dependence of zero‐shear viscosity for polymer solutions: A test of the lyons‐tobolsky equation
Author(s) -
Rink M.,
Pavan A.,
Roccasalvo S.
Publication year - 1978
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.760181005
Subject(s) - thermodynamics , viscosity , polymer , materials science , solvent , relative viscosity , intrinsic viscosity , constant (computer programming) , temperature dependence of liquid viscosity , chemistry , organic chemistry , composite material , physics , computer science , programming language
The empirical equation proposed by Lyons and Tobolsky (1) to describe the concentration dependence of zero‐shear viscosity in polymer solutions was tested on a variety of data taken from the literature, covering different polymer‐solvent systems, molecular weight, temperature, and the whole concentration range. This equation was fitted to each set of experimental viscosity‐concentration data by a least squares method. The validity of this equation is verified. The dependence of the optimal values obtained for the three parameters intrinsic viscosity, [η], Huggins constant, k , and new empirical constant, b , on molecular weight, temperature, and solvent is also discussed.