The technique of modern dielectric spectroscopy with remote interdigitated electrode sensors was used to examine the progress of curing of epoxy resins formed from reaction of the diglycidyl ether of bisphenol A (DGEBA) (EPON 825) with a 3,3'-diaminodiphenylsulfone (DDS) crosslinker and 1-naphthylamine, adamantylamine, and POSS pendant bulky groups. Ion viscosity-cure time profiles were used to investigate the effect of varying pendant bulky group on curing behavior of composites. It is concluded that dielectric spectroscopy is a powerful tool for monitoring the kinetics of composite resin curing in real time.  Isoconversional DSC analysis was also used to elucidate the relationship between activation energy and conversion for these materials.

Dielectric spectroscopic and DSC studies of the cure kinetics of epoxy networks with bulky pendant groups

243rd National Meeting (2012)

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