Relaxation spectra in poly(methylmethacrylate): Comparison of acoustic attenuation and light scattering data

G. Caliskan; A. Kisliuk; V. N. Novikov; A. P. Sokolov

doi:10.1063/1.1370392

Relaxation spectra in poly(methylmethacrylate): Comparison of acoustic attenuation and light scattering data

G. Caliskan, A. Kisliuk, V. N. Novikov, A. P. Sokolov

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Abstract

Acoustic attenuation and light scattering data were compared for investigating relaxation processes in polymethylmethacrylate. It was found that the model of asymmetric double well potentials cannot describe all the data consistently. A good agreement of the model with experimental data was noticed on assuming an additional relaxation in GHz region with a constant loss spectrum. The frequency range from 1 Hz to 17 GHz was covered by acoustic attenuation data and from 0.5 t0 10,000 GHz was covered by light scattering.

Original language	English
Pages (from-to)	10189-10195
Number of pages	7
Journal	Journal of Chemical Physics
Volume	114
Issue number	22
DOIs	https://doi.org/10.1063/1.1370392
State	Published - Jun 8 2001
Externally published	Yes

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10.1063/1.1370392

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abstract = "Acoustic attenuation and light scattering data were compared for investigating relaxation processes in polymethylmethacrylate. It was found that the model of asymmetric double well potentials cannot describe all the data consistently. A good agreement of the model with experimental data was noticed on assuming an additional relaxation in GHz region with a constant loss spectrum. The frequency range from 1 Hz to 17 GHz was covered by acoustic attenuation data and from 0.5 t0 10,000 GHz was covered by light scattering.",

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AU - Sokolov, A. P.

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AB - Acoustic attenuation and light scattering data were compared for investigating relaxation processes in polymethylmethacrylate. It was found that the model of asymmetric double well potentials cannot describe all the data consistently. A good agreement of the model with experimental data was noticed on assuming an additional relaxation in GHz region with a constant loss spectrum. The frequency range from 1 Hz to 17 GHz was covered by acoustic attenuation data and from 0.5 t0 10,000 GHz was covered by light scattering.

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Relaxation spectra in poly(methylmethacrylate): Comparison of acoustic attenuation and light scattering data

Abstract

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