Polytetrabromobisphenol A phosphazene flame retardant and resin-based composite material

The invention discloses a polytetrabromobisphenol A phosphazene flame retardant, the flame retardant is prepared from phosphonitrilic chloride trimer and tetrabromobisphenol A, and the flame retardant has a better flame retardant effect and a better synergistic effect. The invention also provides a resin-based composite material. The resin-based composite material is prepared from the following raw materials in parts by mass: 20-60 parts of polymer resin, 20-58 parts of reinforced fibers, 1.5-4 parts of a low-shrinkage additive, 1-4 parts of a polytetrabromobisphenol A phosphazene flame retardant, 0.5-1.5 parts of an internal release agent, 1-3 parts of an antioxidant and 2-6 parts of an initiator. The resin-based composite material disclosed by the invention has the effects of light weight, high strength, corrosion resistance, aging resistance, fire prevention and flame retardance, and can be applied to the photovoltaic bracket industry, including but not limited to ground piles, stand columns, transverse an