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Fast three-step method for shear moduli calculation from quartzcrystal resonator measurements

机译:从石英晶体谐振器测量中计算剪切模量的快速三步法

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Quartz crystal resonator measurements can be used for polymernmaterial characterization. The non-gravimetric regime of thesenresonators is exploited: the electrical response of polymer-coatednquartz resonators depends on the polymer shear modulus. Previouslynreported methods employ an electrical admittance analysis together withndifficult and time-consuming data fitting procedures to calculate thenfilm shear modulus. This contribution presents a fast and accuratenthree-step method for the calculation of complex shear moduli of polymernfilms from quartz crystal resonator measurements. In the first step, thenacoustic load impedance is calculated from the electrical admittance ofnthe quartz crystal. The key point of this method is the application of anfamily of approximations for the calculation of the shear modulus fromnthe acoustic load impedance in the second step. In the third step, thenbest approximation is improved further in an iterative procedure
机译:石英晶体谐振器的测量可用于聚合物材料的表征。利用了谐振器的非重力状态:涂有聚合物的石英谐振器的电响应取决于聚合物的剪切模量。先前报道的方法采用电导率分析以及困难且费时的数据拟合程序来计算薄膜剪切模量。这一贡献提出了一种快速准确的三步法,用于根据石英晶体谐振器测量结果计算聚合物膜的复数剪切模量。第一步,根据石英晶体的电导率计算出声负载阻抗。该方法的关键是在第二步骤中应用近似族从声载阻抗计算剪切模量。第三步,在迭代过程中进一步改善最佳逼近度

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