Hetalo A. Influence of fluorine substitution in aliphatic alcohols on their rheological and acoustic properties

This thesis is devoted to the experimental study of the effect of the substitution of hydrogen atoms by fluorine atoms in the molecules of monoatomic aliphatic alcohols on their physical properties, in particular the connection of rheological and acoustic properties of fluorine-substituted alcohols with their molecular structure. The speed of ultrasonic propagation, ultrasonic absorption coefficient, kinematic viscosity, density and refractive index in fluorine-substituted monohydric alcohols in the temperature range (293–363) K. The thermodynamic parameters of viscous flow, modulus, modulus viscosity, acoustic relaxation times and the coefficient of classical ultrasound absorption. There is a sharp increase in the density of fluorine-substituted alcohols, and the shear viscosity increases the more significantly the more hydrogen atoms are replaced by fluorine atoms in the alcohol molecule. In fluorine-substituted alcohols, the absorption coefficient, the speed of propagation of ultrasound and the modulus of adiabatic compressibility change. Analysis of the acoustic properties of fluorinated alcohols shows that, as in aliphatic alcohols, the mechanism of sound absorption in fluorinated alcohols is mainly due to structural relaxation, in the processes of rearrangement of associated complexes mainly due to redistribution of hydrogen bonds.