▎ 摘　　要

Reduced graphene oxide (rGO) exerts excellent performance in polymers, but suffers from poor dispersion. Here, the electrostatic interaction between the phenolic hydroxyl group of m-cresol and rGO was discovered for the first time, and benzoxazine with m-cresol containing rGO as the phenolic source were synthesized to achieve a more uniform dispersion of rGO in benzoxazine. The results show that the in situ synthesized rGO/benzoxazine system exhibited superior properties, including a lower curing reaction temperature (21 degrees C relative reductions in curing temperature (225.7 degrees C) for the system with 2 wt% rGO added in situ), higher dielectric constant ((8.69) relative improvement of 0.79), higher electromagnetic shielding value at 8.2-12.4 GHz ((7.45 dB) relative improvement of 0.75 dB), and higher thermal diffusivity at room temperature ((0.162 mm(2)/s) relative improvement of 26%). This study provides a method to homogeneously disperse rGO in benzoxazine without using of a solvent or any other treatment.