Tyutyunnyk O. Acoustic spectra of polymer electrolytes on the basis of solution of LiClO4 in polyethylenoxides.

Works are defending, in which the acoustic spectra and reological properties of polyethyleneglycols, and polymer electrolytes on the basis of solution of salt of LiClO4 in polyethyleneglycols are systematically investigated. The thermodynamic parameters are calculated and the mechanism of viscous flow and acoustic relaxation in the investigated polymer electrolytes is proposed. The characteristics of modifiable influence of the chain length and the nature of end (OH, COCH3,) functional groups and concentrations of salt LiClO4 on the parameters of acoustic processes have been received. It is true that the relaxation processes, which have been observed, are connected with the conformational changes (low frequency process) and with the local segmental motion of the polymer chains. The parameters of these processes have been calculated.