Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Viscosity
Patent
1984-11-07
1986-04-01
Levy, Stewart J.
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Viscosity
73 611C, G01N 1104
Patent
active
045789908
ABSTRACT:
A means for measuring either the intrinsic or inherent viscosity of a solute in solution with a solvent which is independent of flow rate and temperature fluctuations. The solution is passed through one capillary tube and the solvent through a second capillary, and the pressure drop across each is measured. Signals corresponding to each pressure drop measurement are fed to a logarithmic amplification means where they are processed to determine either the intrinsic or inherent viscosity of the solute independent of flow rate and temperature fluctuations. The viscosity measuring means may also be used together with size exclusion chromatrography to determine the molecular weight distribution of polymer materials. It may also be used to measure the relative viscosity of a sample liquid and a reference liquid, and to determine the viscosity of the sample liquid independent of flow rate and temperature fluctuations.
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Ouano-J. Polym. Sci., Part A-1, 10, 2169 (1972).
Abbott Scot D.
Yau Wallace W.
E. I. Du Pont de Nemours and Company
Fricke Hilmar L.
Levy Stewart J.
Williams Hezron E.
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