NON-NEWTONIAN FLOW OF DILUTE POLYMETHACRYLIC ACID SOLUTIONS AT DIFFERENT DEGREES OF NEUTRALIZATION AND IONIC STRENGTHS
Technical summary rept. Jan 1964-Jan 1965
UPPSALA UNIV (SWEDEN) INST OF PHYSICALCHEMISTRY
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A careful experimental study of the gradient dependence of viscosity for dilute solutions of polymethacrylic acid M 112,000 was performed. Measurements were made at six degrees of neutralization between 10 and 90 percent and ionic strengths between 0.0005 M and 0.005 M. The velocity gradient range covered is 2 - 71,000sec. Isoionic dilution was employed to permit linear extrapolation to zero concentration. As expected the gradient dependence is most pronounced when the polymer is highly charged and the ionic strength is low. The experimental results are mainly viewed in the light of theories concerning the rigidity of the macromolecular coil.
- Physical Chemistry
- Fluid Mechanics