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材料工程  2006 

StudyonCureBehaviorofaModelEpoxySystembyMeansofTTTDiagram

, PP. 57-62

Keywords: epoxyresin,curebehavior,TTTdiagram

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Abstract:

Curingbehaviorofamodelepoxiessystem(E-54/AG-80)withDDSashardenerwasstudiedinthispaper.RounddiskcompressionmodeDMAwasexecutedtostudythegelbehaviorsatdifferenttemperaturestodeterminetherelationshipbetweengel-time(tgel)andtemperature.ThecurekineticswasstudiedbydynamicDSCanalysis.Parameterswereobtainedforestablishingaphenomenologicalcurereactionmodel.Therelationshipbetweenglasstransitiontemperature(Tg)andcuredegree(α)wasalsoanalyzedbybothisothermalanddynamicDSCmethodbasedonDiBenedettoequation,whichgaveamathematicaldescriptionofTgasafunctionofbothtimeandtemperature.Consequently,characteristictemperaturessuchasTg0,gelTgandTg∞weredetermined.Finally,theTime-Temperature-Transition(TTT)diagramwasdesignedbasedonthedataandequations.

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