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The non-gravimetric quartz crystal resonator response and its application for determination of polymer shear modulus

An application of quartz crystal resonator measurements for characterization of polymer materials is presented. It exploits the non-gravimetric response of these resonators, namely the dependence of the electrical response of polymer-coated quartz crystal resonators on the polymer's shear modulus. The possibility and an acoustic limit for this method for determination of shear moduli are discussed. It is shown that this application of quartz crystal resonators is in contrast to the well known mass detection according to gravimetric working conditions. An error analysis for the gravimetric frequency interpretation for polymer-coated crystals is presented.