Studies on graphene oxide/BMI-reinforced polybenzoxazine nanocomposites

摘要

Polybenzoxazine (PBz)/BMI/reduced graphene oxide (rGO) nanocomposites were prepared by varying the weight percentage of rGO from 1 to 5wt%. The exfoliated sheet morphology of rGO makes it well-dispersed in the PBz/BMI matrix. The curing process monitored by DSC analysis showed two exothermic curves. Of which one is due to the reaction between BMI and furan ring and the other due to ring-opening polymerization. The nanocomposites did not show any agglomeration even at higher loadings (5wt%) of rGO nanofillers. The degree of dispersion of rGO nanofillers resulted in enhancement of mechanical and thermal properties of PBz/BMI/rGO nanocomposites. A very low percentage of the nanofillers of about 5wt% could tremendously increase the thermal stability, storage modulus and dielectric properties of the nanocomposites.