Shear and longitudinal attenuations and quality factors of poly(methyl metacrylate) (PMMA) from 20 kHz to 12 MHz investigation with ultrasonic spectroscopy

•Very large bandwidth study of PMMA ultrasonic attenuation and quality factor.•Non-linear behaviour of longitudinal and shear attenuation versus frequency.•Drop of quality factors at low frequencies.•Power laws of attenuation and quality factors versus frequency in the range 20 kHz-12 MHz. PMMA is o...

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Bibliographic Details
Published in:Ultrasonics 2023-09, Vol.134, p.107104-107104, Article 107104
Main Authors: Laux, D., Chabanol, G., Sapey, G., Ferrandis, J.-Y., Rosenkrantz, E.
Format: Article
Language:English
Subjects:
Acoustics
Attenuation
Engineering Sciences
Physics
PMMA
Quality factor
Relaxation
RUS
Ultrasonic spectroscopy
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Summary:•Very large bandwidth study of PMMA ultrasonic attenuation and quality factor.•Non-linear behaviour of longitudinal and shear attenuation versus frequency.•Drop of quality factors at low frequencies.•Power laws of attenuation and quality factors versus frequency in the range 20 kHz-12 MHz. PMMA is often considered as a calibration material for experimental benches dedicated to viscoelasticity investigation. Nevertheless, regarding literature, data concerning attenuation coefficients and quality factors are essentially available in the MHz frequency range and results in the low-frequency range are scarce and scattered. In this communication, thanks to the use of high-frequency ultrasonic spectroscopy between 2 and 8 MHz in the range 6 °C − 45 °C, Time-Temperature Superposition principle and Resonant Ultrasonic Spectroscopy (RUS), we show that both longitudinal and shear quality factors of PMMA decrease considerably for low frequencies (
ISSN:0041-624X
1874-9968
DOI:10.1016/j.ultras.2023.107104