Ultrasonic anisotropy measurements and the mechanical properties of polymeric materials

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Abstract
The paper considers the usefulness of ultrasonic measurement for monitoring the properties of commercially processed material. It can be applied nondestructively for quality control; or by taking sections, full measurement of anisotropy can be made. The methods are exemplified by results for moulded and solid-state-formed polypropylene; and a full 5 MHz elastic measurement has been performed in one case. The relationship of the 5 MHz moduli to those obtained by more usual techniques is also considered; and the possibility of correlation with tensile and impact results. It is felt that the technique will have growing commercial importance.

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