VISCOELASTIC MEASUREMENTS OF POLY(DIMETHYLSILOXANES) AND A POLYSTYRENE SOLUTION USING LAYERED WAVEGUIDE TECHNIQUE

An experimental system is developed to measure the high frequency viscoelastic constants of liquids and deformable solids using a layered waveguide geometry consisting of an aluminum strip delay line upon which coatings are applied. From the measurements the viscoelastic constants of the sample are calculated using the layered waveguide equations developed earlier. The conditions under which these equations can be applied to the delay line are discussed in detail. The measured viscoelastic properties agree with those reported in the literature.