Naslov
Cure Kinetics of Neat and Carbon-Fiber-Reinforced TGDDM/DDS Epoxy Systems

Autori
Opalički, Marica ; Kenny, Jose Maria ; Nicolais, Luigi

Izvornik
Journal of applied polymer science (0021-8995) 61 (1996); 1025-1037

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Sažetak
The cure kinetics of neat and carbon fiber-reinforced commercial epoxy systems, based on Tetraglycidyl-4, 4"-diaminodiphenylmethane (TGDDM) and 4, 4"-diaminodiphenylsulfone (DDS) were studied by means of differential scanning calorimetry (DSC). Analysis of DSC data indicated that the presence of the carbon fibers has a very small effect on the kinetics of cure. A kinetic model, arising from an autocatalyzed reaction mechanism, was applied to isothermal DSC data. The effect of diffusion control was incorporated into the reaction kinetics by modifying the overall rate constant, which is assumed to be a combination of the chemical rate constant and the diffusion rate constant. The chemical rate constant has the usual Arrhenius form while the diffusion rate constant is described by a type of the Williams-Landel-Ferry (WLF) equation. The kinetic model, with parameters determined from isothermal DSC data, was successfully applied to dynamic DSC data over a broad temperature range which covers usual processing conditions.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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