| With phthalic anhydride （PA） as curing agent and N, N-dimethyl benzyl amine （BDMA） as catalyst, the curing of epoxy soybean oil （ESO） was investigated by variable temperature infrared spectroscopy method, and the kinetics parameters (reaction rate constant, activation energy and reaction order) were obtained by fitting autocatalytic model. The results showed that there were two stages in the curing of ESO, in which the activation energy of initiation stage was higher than that of circulation stage. The reaction rate constant of initiation stage increased with the temperature rising, while the total reaction order changed slightly. The effects of curing conditions on the mechanics properties of cured product were studied using universal mechanics testing machine, DSC and TG. It was found that with dosages of PA and BDMA increasing, the tensile strength and vitrification transition temperature increased. Catalyst had great influence on the elongation at break and maximum thermal decomposition temperature. With the dosage of catalyst increasing, the toughness of cured product decreased, while the maximum thermal decomposition temperature rised. |
