Influence of Ultraviolet Radiation on Epoxy-Polysulfone Fiberglass

The effect of ultraviolet radiation on the physico-mechanical properties of fibrous composite materials modified with polysulfone has been studied. In most cases, ultraviolet radiation has virtually no effect on the properties of epoxy fiberglass. Nevertheless, the specific fracture toughness of the winding composite modified by 20 wt % of polysulfone has increased (by 45% or up to 1.9 kJ/m² after 5 days of irradiation). In other cases, the change in the properties (compressive and shear strength) of the composites has not exceeded 10%. In addition, in all the conducted experiments concerning the physico-mechanical properties, the addition of polysulfone has led to an increase in the characteristics of fiberglass (crack resistance, shear and compression strength).