科研之友
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摘要
The diffusion of ferrocene methanol in supercooled glycerolwater mixtures has been measured over a wide viscosity range, which allowed analyzing the composition dependence of the StokesEinstein breakdown (diffusionviscosity decoupling). The observed decoupling exhibits a common behavior for all studied compositions (glycerol mass fractions between 0.7 and 0.9), determined by the reduced temperature (T/T-g) of the mixtures. This result differs from that reported previously for the diffusion of glycerol in its aqueous solutions, where the reduced temperature for the decoupling decreases with increasing water content. We conclude that the contradictory results are only apparent, and they can be explained by the use of inconsistent extrapolated values of the viscosity of the glycerolwater mixtures in the supercooled region.
- 出版日期2015-1-8
