hand side SEM and AFM images. Based on them, we have
estimated: maximal cluster size = 0.25mm and mean cluster
size = 0.10–0.15mm. This means that the phase separation has
occurred in the nano-scale, which implies an efficient modifying
of the epoxy phase. We also suppose that this finding is in
agreement with the Tg decrease, as well as with the microhardness
test of the fully cured material.