UV-water weathering degradation of the flax fiber reinforced polymer composites

This study investigates the effect of weathering aging on the flax fiber reinforced polymer composites for civil engineering applications. The specimens were exposed to an accelerated weathering environment simulating the outdoor environment for up to 1500 hours. Tensile and three-point bending tests were performed to evaluate the mechanical degradation. Microscope observation was employed to check the change of fiber and matrix. All samples experienced reductions in both tensile and flexural properties with increased exposure time. However, the thickness of sample are found to affect the weathering effect, which is the increased thickness can delay the degradation of mechanical properties.