Understanding the elastic properties of the various types of rubber is important for many commercial and academic applications. A sample set consisting of generic elastomeric compounds was studied using non-destructive non-contact ultrasonic techniques. The longitudinal sound wave velocities in the sample and wave amplitude attenuation in the sample were measured. These non-contact measurements were taken with the Second Wave Inc. Non-Contact Analyzer 1000 (NCA1000). These results were corroborated via a contact method, using a Panametrics 5852 pulser/receiver. The transducers were commercially available contact and non-contact transducers. The coupling media for the contact method were gel and honey. The preliminary results suggest that the differences in attenuation are driven by polymer type and also to a lesser extent the loading level of carbon black fillers. Here the technical approach to the experiments, preliminary results, and an outline for future work are presented.
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