Ultraviolet-curable resin composition and fiber reinforced resin-based composite material thereof

The invention relates to an ultraviolet-curable resin composition and a fiber reinforced resin-based composite material thereof, and belongs to the technical field of light curing technologies and resin-based composite materials. The ultraviolet-curable resin composition comprises, by weight, 90-110 parts of epoxy resin, 0.1-0.7 parts of a cationic photoinitiator, 0.1-0.5 parts of a thermal initiator, 0-1 part of a photosensitizer, 0-35 parts of an active diluent and 0-30 parts of an additive. The ultraviolet-curable resin composition initiates a cationic polymerization reaction under the irradiation of ultraviolet light; and heat release of the polymerization reaction and the decomposition of the cationic photoinitiator commonly urges the thermal initiator to decompose in order to initiate a self propagating wave polymerization reaction. The ultraviolet-curable resin composition has the advantages of fast curing speed, high curing thickness, and realization of one-stage rapid deep curing. The fiber reinforced resin-based composite material with the composition as a matrix phase has good tensile strength, and curing is not affected by the laying layer number of fibers or the light transmission of a reinforcing phase.