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Measurements of ultrasonic velocity and attenuation in biaxially oriented polypropylene films using fast fourier transform
Author(s) -
Malinarič Svetozár
Publication year - 1994
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1994.070521006
Subject(s) - attenuation , anisotropy , polypropylene , ultrasonic sensor , materials science , fourier transform , ultrasonic attenuation , phenomenological model , composite material , optics , acoustics , physics , condensed matter physics , quantum mechanics
The first part of this study deals with the design of a new instrument for measuring the velocity and attenuation of ultrasonic waves propagating in thin polymeric films. The experimental results indicate a large anisotropy. In addition, a strong velocity and attenuation dependence on both frequency and temperature has been observed. The results are explained by means of phenomenological theory. © 1994 John Wiley & Sons, Inc.