Abstract
The results of measurements of the hypersound velocity and absorbtion by Mandelstam—Brillouin spectra in aqueous solutions of glycerin in a wide temperature (viscosity) range are presented. It is shown that the experimental results are well described by formulas of the Isakovich—Chaban nonlocal theory based on the assumption about the two-component structure of a viscous liquid containing clusters with sharp boundaries, “floating” in a disordered liquid. In the experiment, the viscous component concentration in a low-viscosity medium was varied, which corresponded to cluster concentration variations in it. It was shown that clusters are stable structures. The number of clusters decreases as a low-viscosity solvent is added, while their size remains unchanged.
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