P] of EPN/ PPOE is even higher than that of EPN/EPPO as there are more epoxy groups on the end of PPOE and greater probability to react with curing agent.
Therefore, it is considered that the reactive blending of PPOE and epoxy resin is an efficient approach to promote the curing rate and degree of curing as it introduces more epoxy groups.
PPOE not involved in crosslinking reaction is well dispersed in matrix and its size is much smaller than that in EPN/PPO and EPN/EPPO.
However, only PPOE not engaged in crosslinking reaction can be observed in SEM micrographs, thus TEM was employed to investigate the phase morphology of the blends.
Therefore, compared to EPPO that possessed only one epoxy group on its end, PPOE could better improve the miscibility of blend owing to its greater reactivity and function of compatibilizer.
Tds% of EPN/PPOE is much higher than that of EPN/ PPO and EPN/EPPO, meaning PPOE is more reactive in the crosslinking reaction to obtain a crosslinked structure and improve the thermal stability of the blend.