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Proceedings Paper

Dynamics of an epoxy system near the glass transition studied by Brillouin and dielectric spectroscopies
Author(s): L. Comez; Daniele Fioretto; L. Verdini; A. Livi; Pierangelo A. Rolla
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Paper Abstract

The relaxation processes of an epoxy resin were investigated by light scattering and broadband dielectric spectroscopy around the glass transition temperature Tg. Dielectric spectroscopy measurements give evidence of tow relaxations, a structural and a secondary one, merging into a single process well above Tg. Besides the regular divergence of the structural relaxation time, the glass transition is also evidenced by changes of the shape parameters and of the relaxation strength of the secondary process. A comparison between dielectric and Brillouin data shows that Brillouin spectra are markedly sensitive to the secondary relaxation.

Paper Details

Date Published: 13 June 1997
PDF: 6 pages
Proc. SPIE 3181, Dielectric and Related Phenomena: Materials Physico-Chemistry, Spectrometric Investigations, and Applications, (13 June 1997); doi: 10.1117/12.276270
Show Author Affiliations
L. Comez, INFM (Italy) and Univ. of Perugia (Italy)
Daniele Fioretto, INFM (Italy) and Univ. of Perugia (Italy)
L. Verdini, INFM (Italy) and Univ. of Perugia (Italy)
A. Livi, INFM (Italy) and Univ. of Pisa (Italy)
Pierangelo A. Rolla, INFM (Italy) and Univ. of Pisa (Italy)


Published in SPIE Proceedings Vol. 3181:
Dielectric and Related Phenomena: Materials Physico-Chemistry, Spectrometric Investigations, and Applications
Andrzej Wlochowicz, Editor(s)

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