Vs. Sperkach et al., ON ACOUSTIC RELAXATION MECHANISMS IN THE DISPERSE SYSTEM AEROSIL - POLYPROPYLENE GLYCOL, UKRAINSKII FIZICHESKII ZHURNAL, 38(12), 1993, pp. 1793-1796
Results of analysis of superfluous sound absorption in the disperse sy
stem on the basis of polypropylene glycol with aerosil are presented.
The sound absorption was measured in the frequency range of 3 - 1200 M
Hz by the impulse method. The presence of aggregates is shown, their s
izes are calculated for different aerosil concentrations in the region
of temperature 283 - 343 K. The sound absorption in the frequency ran
ge of 3 - 110 MHz is due to a friction of aggregates with a liquid but
in the higher frequency range it is due to reorganization structure p
rocesses in polypropylene glycol.