LAUSR

This study investigates the use of dopamine‐functionalized reduced graphene oxide (DF‐rGO) to enhance the properties of epoxy‐based thermosetting resins through copolymerization with 4,5‐epoxycyclohexane‐1,2‐dicarboxylic acid diglycidyl ester (epoxy). Incorporating DF‐rGO into the epoxy system reduced the activation energy during the curing process, accelerating curing kinetics. Comprehensive analysis revealed significant improvements in thermal stability, glass transition temperature, and thermal conductivity of the epoxy resin composites. Mechanical property evaluations demonstrated that DF‐rGO acts as an effective toughening agent, with optimal toughness achieved at 0.3 wt% DF‐rGO. This enhancement is attributed to improved interfacial adhesion and effective stress and crack propagation resistance provided by DF‐rGO. These findings establish DF‐rGO as a dual‐functional epoxy reinforcement that simultaneously enhances toughness and thermal conductivity while maintaining thermomechanical stability. This work resolves the long‐standing trade‐off between impact strength and thermal management in composites, providing a scalable design strategy for aerospace, electronics, and extreme‐environment insulation systems requiring integrated performance.