Vitrified ultraviolet crosslinking low-smoke halogen-free flame-retardant polyolefin composition and preparation method thereof

The invention discloses a vitrified ultraviolet crosslinking low-smoke halogen-free flame-retardant polyolefin composition and a preparation method thereof, and belongs to the field of preparation of high polymer materials. The composition comprises the following raw materials: polyolefin resin, a compatilizer, vitrified powder, a fluxing agent, a flame retardant, a lubricant, an antioxidant, a coupling agent, a photoinitiator and a crosslinking sensitizer. The raw materials are mixed according to a specific sequence, extruded and granulated, and an ultraviolet light crosslinking technology is used when the final product is prepared. The material provided by the invention not only has the fire resistance of a common vitrified polyolefin composition, but also has very good fire resistance and temperature resistance, is low in smoke production during combustion, is non-toxic and non-corrosive, is added with the photoinitiator and the crosslinking sensitizer, and uses the ultraviolet light crosslinking technolog