Halogen-free fiberglass reinforced polypropylene composite material and preparation method thereof

The invention discloses a halogen-free fiberglass reinforced polypropylene composite material and a preparation method thereof. The preparation method of the halogen-free fiberglass reinforced polypropylene composite material comprises the steps that a char forming agent is adsorbed on the surface of fiberglass through the hydrogen-bond interaction between the fiberglass and the char forming agentwhich are treated by a coupling agent, and thus a surface-modified fiberglass reinforced body is obtained; and after polypropylene resin, the modified fiberglass reinforced body, an intumescent flameretardant, a compatilizer and an antioxidant are composited through a melt blending method, the polypropylene composite material is prepared. Due to the fact that the surface of the fiberglass is coated with the char forming agent, the char forming agent on an interface is in synergy with the intumescent flame retardant in a substrate, in the combustion process, the wettability of a polymer meltto the fiberglass is reduce