▎ 摘　　要

Benzoxazine monomer containing chalcone moiety was prepared through Mannich condensation reaction. The monomer and monomer mixed with different ratios of graphene oxide were exposed to UV irradiation followed by thermal curing to produce pristine thermoset and nanocomposites, respectively. The monomers, pristine thermoset and nanocomposites were characterized by analytical techniques such as H-1-NMR, C-13-NMR, FTIR, SEM and XRD. The peak characteristic to oxazine ring disappeared in the pristine thermosets and nanocomposites confirming successful ring-opening polymerization. The (001) plane in GO was not observed in the nanocomposites revealing the dispersion of graphene layers in the polymer matrix, and the dispersion was confirmed by SEM examination. The thermal properties using TGA and DSC indicate that the presence of graphene oxide catalyzes the ring-opening of oxazine and decreases the curing temperature up to 80 degrees C compared with pure benzoxazine monomer. In addition, the nanocomposites exhibit higher thermal stability and electrical conductivity compared with the pristine thermoset. [GRAPHICS]