High-strength flame-retardant PP composite material and preparation method thereof

Abstract

The application relates to a high-strength flame-retardant PP composite material and a preparation method thereof, and belongs to the technical field of high polymer materials. The high-strength flame-retardant PP composite material disclosed by the application comprises the following raw materials in parts by weight: isotactic polypropylene 20-50 parts, modified polypropylene 60-80 parts, flame retardant 10-12 parts, coupling agent 1-2 parts and lubricant 0.3-0.5 parts. The application adopts polysiloxane grafted polypropylene to increase the molecular weight and molecular chain of the polypropylene, inhibit the breakage of the polypropylene molecular chain, and form a stable polysiloxane network structure after the hydroxyl polyphenylpropyl siloxane is cracked, so that the polypropylene is greatly endowed with excellent flame retardancy. In addition, the addition of the flame retardant releases nitrogen to destroy the combustion condition, and further enhances the flame-retardant effect of the composite material. The application adopts temperature change stretching in the horizontal and vertical directions to control the direction of crystallization, refine the crystal, and make the crystal form a space network structure, so that the high-strength flame-retardant PP composite material is obtained.

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