Study on Mechanics and Aging Resistance of Glass Fiber Reinforced Epoxy Resin

Abstract

The study used KH560 coupling agent to modify chopped glass fibers for reinforcing glass fiber/epoxy resin composites. As the glass fiber mass fraction increased, tensile, bending, and impact strength initially rose and then declined. Optimal mechanical reinforcement occurred at a 10% fiber mass fraction. SEM analysis revealed a well-integrated interface between glass fibers and the resin matrix, facilitating stress transfer and crack resistance. However, excessive fiber content led to diminished mechanical properties due to poor dispersion. Short-term UV aging significantly altered the composite's color, attributed to UV-induced photooxidation, though glass fibers' chemical stability mitigated deeper oxidation. Water exposure induced resin hydrolysis over time, further reducing mechanical properties. This research provides foundational insights for developing high-performance glass fiber reinforced epoxy resins as alternatives to metal power fittings.