Newtonian viscosity of polymer solutions over a wide range of compositions as a function of certain parameters determining it

1974 ◽  
Vol 8 (6) ◽  
pp. 978-984
Author(s):  
V. E. Dreval' ◽  
G. O. Botvinnik ◽  
A. Ya. Malkin ◽  
A. A. Tager
Keyword(s):  
Polymer Solutions ◽  
Newtonian Viscosity ◽  
Wide Range

Nonnewtonian Flow of Poly(Dimethyl Siloxane)

1967 ◽  
Vol 40 (5) ◽  
pp. 1483-1491
Author(s):  
Yoshio Ito
Keyword(s):  
Shear Rate ◽  
Polymer Solutions ◽  
Flow Behavior ◽  
Degree Of Polymerization ◽  
High Shear ◽  
Newtonian Viscosity ◽  
Shear Rates ◽  
Molecular Weights ◽  
Dimethyl Siloxane ◽  
Wide Range

Abstract Nonnewtonian flow of poly(dimethyl siloxanes) of various molecular weights has been studied with a short capillary viscosimeter. The experiment covered a wide range of shear rate, from 10−1 to 3×106sec−1. Results were as follows: (1) Flow behavior of the sample changes with the degree of polymerization. For siloxanes with degrees of polymerization less than 1.55×102, flow of the fluid is newtonian throughout the whole range of shear rates; for siloxanes with degrees of polymerization from 3.22×102 to 2.63×103, flow is nonnewtonian at moderate shear rates; it again becomes newtonian at high shear rates. With degrees of polymerization more than 3.31×103, the spiral flow rises to a high shear rate. (2) Plow behavior of the samples is expressed by modifying Shishido's equation proposed for nonnewtonian polymer solutions. (3) When the observed flow curve contains its inflection point, the upper newtonian viscosity can be estimated by a new method proposed here. (4) The relations among the end correction of capillary, the pressure loss, and the shear stress proposed by Shishido for polymer solutions are applicable to poly(dimethy! siloxane) also.

scholarly journals Characterizing anomalous diffusion in crowded polymer solutions and gels over five decades in time with variable-lengthscale fluorescence correlation spectroscopy

Soft Matter ◽  
2016 ◽  
Vol 12 (18) ◽  
pp. 4190-4203 ◽  
Author(s):  
Daniel S. Banks ◽  
Charmaine Tressler ◽  
Robert D. Peters ◽  
Felix Höfling ◽  
Cécile Fradin
Keyword(s):  
Anomalous Diffusion ◽  
Fluorescence Correlation Spectroscopy ◽  
Polymer Solutions ◽  
Tracer Diffusion ◽  
Correlation Spectroscopy ◽  
Fluorescence Correlation ◽  
Wide Range

FCS with a wide range of beam waists was used to measure tracer diffusion in crowded media over five decades in time, thus providing a strong test for different models of anomalous diffusion.

The upturn effect in the non-Newtonian viscosity of polymer solutions

Polymer ◽  
1965 ◽  
Vol 6 (1) ◽  
pp. 35-47 ◽  
Author(s):  
S.P. Burow ◽  
A. Peterlin ◽  
D.T. Turner
Keyword(s):  
Polymer Solutions ◽  
Newtonian Viscosity

Prediction of the non-Newtonian viscosity and shear stability of polymer solutions

1988 ◽  
Vol 266 (9) ◽  
pp. 793-805 ◽  
Author(s):  
M. Bouldin ◽  
W. -M. Kulicke ◽  
H. Kehler
Keyword(s):  
Polymer Solutions ◽  
Newtonian Viscosity ◽  
Shear Stability
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