Influence of Elevated Temperature on the Mechanical and Microstructural Properties of Glass Fiber-Reinforced Polymers

Glass fiber-reinforced polymers (GFRPs) have attracted significant attention as structural materials because of their high fatigue resistance, corrosion strength, and stiffness. This study examined the effect elevated temperatures (150, 250, 350, 450oC) on microstructural mechanical properties GFRP plates. The number bubbles increased firing temperature increased, burst at 250oC or higher, forming pores surface. A tensile test was conducted, maximum stress plates fired 150, 350oC reduced from 54.2 to 52.2, 40.3, 24.0 MPa, respectively, compared that unfired plate. Meanwhile, elastic moduli 19.1 18.3, 16.1, 12.1 GPa, reduction in attributed degradation resin matrix due glass transition decomposition, debonding, an increase surface defects. strain decreased gradually with increasing temperature, suggesting brittleness temperatures.