Glass transition of an epoxy resin. A wideband dielectric investigation

Author

Santucci, S.C. ; Corezzi, S. ; Fioretto, D. ; Capaccioli, S. ; Casalini, R. ; Lucchesi, M. ; Presto, S. ; Rolla, P.A.

Author_Institution

Dipartimento di Fisica, Perugia Univ., Italy

Volume

8

Issue

3

fYear

2001

fDate

6/1/2001 12:00:00 AM

Firstpage

373

Lastpage

376

Abstract

The dynamics of an epoxy resin, poly(phenyl glycidyl ether-co-formaldehyde), has been investigated in the supercooled and glassy phases by wideband dielectric spectroscopy (10^-2 to 3×10⁹ Hz) and compared with that of the previously investigated epoxy resin, diglycidyl ether of bisphenol-A. The temperature evolution of the dynamics of the system is monitored through the characteristic parameters of the relaxations, namely the relaxation times, the relaxation strengths and the shape parameters. Two transition regions are revealed: the glass transition and the split between structural and fast secondary relaxation, where the onset of the structural relaxation is located also

Keywords

glass transition; permittivity; polymers; 1E-2 to 3E9 Hz; epoxy resin; glass transition; glassy phase; poly(phenyl glycidyl ether-co-formaldehyde); relaxation strength; relaxation time; shape parameters; supercooled phase; temperature evolution; wideband dielectric spectroscopy; Curing; Dielectric measurements; Electrochemical impedance spectroscopy; Epoxy resins; Frequency; Glass; Permittivity measurement; Solids; Temperature distribution; Wideband;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/94.933346

Filename

933346