ISSN:
1572-9567
Keywords:
aqueous alcohol solution
;
ethanediol
;
ethylene glycol
;
falling-cylinder viscometer
;
free-volume theory
;
high pressure
;
pressure effect
;
propanediol
;
propylene glycol
;
viscosity
;
water
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract New experimental data on the viscosity of aqueous solutions of 1,2-ethanediol (ethylene glycol) and 1,2-propanediol (propylene glycol) are presented at 298 and 323 K under pressures up to 120 MPa. The measurements were performed by a falling-cylinder viscometer on a relative basis with an uncertainty of less than ±2%. The viscosity of these aqueous solutions at a constant temperature and pressure increases monotonously with increasing concentrations of diols (glycols) and is slightly lower than the mole fraction average value at each composition. The viscosity also increases almost linearly with pressure at a constant temperature and composition. The pressure coefficient of the viscosity, (∂η/∂P)T,x, increases with decreasing temperature and increasing concentrations of diols. The experimental results are correlated with pressure, density, and composition by several empirical equations.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00503150
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