The effect of thermoplastic modification of an epoxy-amine system on the cure reaction, miscibility and thermal stability
of the system was investigated. The cure kinetics showed an autocatalytic behavior. Modifier did not affect either the total
reaction heat or the achieved maximum conversion but delayed the kinetics. The model of Horie-Kamal corrected by diffusion
factor was used to adjust kinetics in the whole range of conversions. The modified systems showed two glass transitions indicating
two separated phases, whose compositions were estimated using the Fox and Couchman equations. Modifier did not affect the
thermal and thermooxidative stability of the system.