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EnglishThe conductivity;and dielectric relaxation behaviour of a:glass-forming monoepoxide, cresyl glycidyl ether (CGE), were studied from 10(2) to 10(7) Hz by impedance spectroscopy, in the temperature interval 83-333 K. Data analysis indicated the existence of a transition temperature T-B congruent to 265 K marking the separation between two different relaxation regimes, in accordance with previous results given by Stickel and co-workers. The temperature T-B is well above the glass transition temperature (T-g = 204 K), and coincides with the temperature at which the timescales of the main and secondary relaxation processes coincide, so at T > T-B there is a unique overall relaxation process. The splining layout of CGE differs from that of the very common diepoxide diglycidyl ether of bisphenol-A (DGEBA), studied previously, and also the relaxation at high temperature has a correspondingly different dynamical behaviour. The relaxation strength behaviour is also analysed and compared with that of DGEBA; the similarities are discussed.
| Autori interni: | CAPACCIOLI, SIMONE (Co-primo) |
| Autori: | S., Corezzi; Capaccioli, Simone; Gallone, GIUSEPPE CARMINE; A., Livi; P. A., Rolla |
| Titolo: | Dielectric behaviour versus temperature of a monoepoxide |
| Anno del prodotto: | 1997 |
| Digital Object Identifier (DOI): | 10.1088/0953-8984/9/29/006 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
File in questo prodotto:
| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| Dielectric behaviour | Testo completo | Versione finale editoriale | NON PUBBLICO - Accesso privato/ristretto | Utenti riconosciuti Richiedi una copia |
http://hdl.handle.net/11568/205735
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