چكيده لاتين :
An investigation was conducted based on: (1) The study of cure mechanisms and kinetics of diglycidyl ether of bisphenol A (DGEBA) using imidazole (H-MI) and 1-methyl imidazol (1-MI) as the curing agents and, (2) the study of some of the properties of the cured epoxy resins. The cure kinetics of DGEBA was studied using dynamic differential scanning calorimetry (DSC) in various low concentrations (>0.5 mol%) of the curing agents. Kinetic analysis using integral procedure on dynamic DSC data indicates
that both H-MI and 1-MI are effective curing agents. The curing reaction of DGEBA with H-MI took place almost 10°C lower than the temperature of its curing reaction with 1-MI. Small low temperature shoulder peaks were observed for both curing systems and for all studied concentrations which are related to the formation of adduct. The formed adduct will initiate the etherification reaction which appears as a large high temperature exothermic peak in dynamic DSC thermogram. Water absorption, chemical resistance to acetone and sodium hydroxide solution, and thermal oxidation of the cured systems are also studied. The DGEBNH-MI and DGEBN1-MI cured systems indicated similar properties.
