Cure kinetics of epoxy resin studied by dynamics and isothermal DSC data

Abstract EN

Diglycidyl ether of bisphenol A (DGEBA) epoxy resin was cured with hardeners aliphatic amine triethylenetetramine (TETA).

Differential scanning calorimetry (DSC) technique was utilized to study the kinetics of cure of (DGEBA)-(TETA) system, diverse hardener/resin ratios were studied, (5, 13and 20) phr.

Isothermal as well as dynamic experiments were carried out of the above mentioned DGEBA/TETA system with three hardener/resin ratios, and cure kinetics were investigated at four temperatures (30, 45, 60 and 80) °C using (DSC) technique.

The process of isothermal cure was simulated by the diffusion model (modified Kamal’s model and four-parameter autocatalytic model.

The obtained outcomes are in good agreement with the experimental results in the early and late cure stages.

The events declare that complete cure at 80 °C attains at the stoichiometric ratio (13 phr).