Capabilities of the dynamic quartz-resonator method for determining the viscoelastic parameters of thin liquid layers

The capabilities of the dynamic quartz-resonator method for determining the viscoelastic properties of liquids in thin layers (to 1 μm) have been studied. Aqueous solutions of glycerin of different concentrations and motor oils of different manufacturers have been used. The process of polymerization of éD-22 epoxy adhesive in the presence of a hardener — polyethylene polyamine — has been investigated as the model experiment. It has been shown that the broadening of the resonant curve and the shift of the resonant frequency plotted as functions of the thickness of a liquid layer enable one to single out the elastic and viscous components; this makes it possible to judge the change in the structure of boundary layers with processes that may occur at the interphase boundary. __________ Translated From Inzhenerno-Fizicheskii Zhurnal, Vol. 80, No. 1, Pp. 193–200, January–February, 2007.