E ring opening on the epoxy units plus the cyclotrimerization of
E ring opening in the epoxy units and also the cyclotrimerization on the O-CN units. Figure 5d displays the FTIR spectra of those hybrids, measured just before and immediately after thermal polymerization at 210, 240, and 270 C. The spectrum with the epoxy resin featured an absorption peak at 914 cm-1 , whilst that of […]