High-rigidity and toughness balance, anti-stress whitening and halogen-free flame retardant polypropylene composite material and preparation method thereof

The invention discloses a high-rigidity and toughness balance, anti-stress whitening and halogen-free flame retardant polypropylene composite material and a preparation method thereof. The composite material consists of the following raw materials in parts by weight: 32-96 parts of polypropylene, 0-30 parts of talcum powder, 1-20 parts of cage-like polysilsesquioxane, 1-15 parts of elastomer, 0.1-1 part of an antioxidant and 0-2 parts of other aids. The high-rigidity and toughness balance, anti-stress whitening and halogen-free flame retardant polypropylene composite material and the preparation method thereof disclosed by the invention have the advantages that through introducing cage-like polysilsesquioxane nanometer particles in a traditional talcum powder reinforced polypropylene baseformula and compounding two different scale systems, the rigidity and the impact resistance of the polypropylene composite material can be significantly improved; meanwhile, the nano-sized cage polysilsesquioxane particles ca