LAHLALI, Nadir Douadi; NAFFAKH, Mohammed; DUMON, Michel

doi:10.1002/pen.20274

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LAHLALI, Nadir Douadi
Ingénierie des Matériaux Polymères - Laboratoire des Matériaux Polymères et des Biomatériaux [IMP-LMPB]

NAFFAKH, Mohammed
Ingénierie des Matériaux Polymères - Laboratoire des Matériaux Polymères et des Biomatériaux [IMP-LMPB]

DUMON, Michel

Ingénierie des Matériaux Polymères - Laboratoire des Matériaux Polymères et des Biomatériaux [IMP-LMPB]
Team 1 LCPO : Polymerization Catalyses & Engineering

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Polymer Engineering and Science. 2005, vol. 45, n° 12, p. 1581-1589

Wiley-Blackwell

Résumé en anglais

An epoxy resin diglycidyl ether of bisphenol A (DGEBA) is cross-linked with the help of two aromatic diamine 4,4'diaminodiphenylsulfone (DDS) + 4,4'-methylenebis 3-chloro 2,6-diethylaniline (MCDEA) of nearly equal flexibility but different reactivities. The ratio of the two amines is varied while keeping the stoichiometry of the epoxy/amino hydrogen groups constant. The experimental cure kinetics are studied at four different isothermal temperatures. Their modeling is carried out by a phenomenological Kamal-Sourour kinetic model. The procedure is two-fold: 1) linear combinations of the values of rate constants from the two neat thermosets (based on only one amine) and 2) values calculated directly from isothermal cures of reactive amine mixtures. A good correlation was observed between the experimental data and the model predictions (both procedures). These amine formulations provide "mixed" epoxy thermosets and will be used later to control thermoset/thermoplastic blend morphologies for which reaction kinetics need to be predicted.< Réduire

Mots clés en anglais

RTM

RATES

SYSTEM

NETWORKS

FORMULATION

POLYMER

INDUCED PHASE-SEPARATION

SCANNING CALORIMETRY

THERMOSET CURE

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Cure kinetics and modeling of an epoxy resin cross-linked in the presence of two different diamine hardeners

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