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Radiofrequency (27.12 MHz) activation of the curing reaction of epoxy resins of DGEBA type
Author(s) -
Alazard Patrick,
Gourdenne Albert
Publication year - 1997
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19971220129
Subject(s) - epoxy , thermosetting polymer , materials science , curing (chemistry) , composite material , dielectric , activation energy , polymer chemistry , chemistry , organic chemistry , optoelectronics
Radiofrequency (27.12 MHz) heating is used for the activation of the curing reaction of an epoxy resin of DGEBA a ) type in presence of diaminodiphenylmethane as crosslinking agent. The principle of the activation process is based on the partial conversion as heat of the dielectric loss in the organic medium due to the forced dipolar relaxation at 27.12 MHz. The samples of thermosetting matter are positioned between two parallel steel plates or electrodes, and an electrical voltage is applied. When the temperature is sufficiently high, the step‐growth reactions starts working.