Figure 10.

(a) Phase morphologies as a function of PEI content in epoxy/PEI system (particulate morphology at 10 wt % PEI, co-continuous morphology at 15 wt % PEI and phase-inverted morphology at 20 wt % PEI). Reprinted with permission from ref. [28], Copyright [2018], American Chemical Society. (b) Fracture energy of epoxy/PEI systems as a function of PEI content at different curing temperatures. Reprinted with permission from ref. [33], Copyright [2001], John Wiley and Sons.