Analysis of Acoustic Relaxation Thermodynamic Parameters of Some Nonionic Surfactants and their Solutions

The study tested the relaxation and thermodynamic parameters of fast and ultrafast processes of some nonionic surfactants and their solutions used in practice. First, we analyzed these parameters, as well as their temperature dependence (in the range between 253 and 333 K) and their dependence on surfactants structure. Then, we calculated the relaxation and thermodynamic parameters according to the acoustic spectra of the sound velocity and absorption in some nonionic surfactants and their solutions in the frequency range from 12 MHz to 2 GHz. Finally, we examined the possible molecular mechanisms of reorganization processes of the investigated surfactants and their solutions.

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