▎ 摘　　要

NOVELTY - Composite material comprises periodic brominated polyethylene (I) and graphene. The periodic brominated polyethylene has a number average molecular weight of 5000-80000. The mass ratio of periodic brominated polyethylene (I) to graphene is 1000:0.1-50. The composite material has: a crystal melting peak temperature of greater than or equal to 100 degrees C as measured in a differential scanning calorimetry at a heating rate of 10 degrees C/minute; a tensile strength of greater than or equal to 20 MPa; and a tensile modulus of greater than or equal to 400 MPa. USE - Composite material (claimed). ADVANTAGE - The composite material has high melting point and high strength. DETAILED DESCRIPTION - Composite material comprises periodic brominated polyethylene of formula: (-CH(Br)-(CH2)2x-2-) (I), and graphene. The periodic brominated polyethylene has a number average molecular weight of 5000-80000. The mass ratio of periodic brominated polyethylene (I) to graphene is 1000:0.1-50. The composite material has: a crystal melting peak temperature of greater than or equal to 100 degrees C as measured in a differential scanning calorimetry at a heating rate of 10 degrees C/minute; a tensile strength of greater than or equal to 20 MPa; and a tensile modulus of greater than or equal to 400 MPa. x=3, 6, 9, or 18. An INDEPENDENT CLAIM is included for the method for the preparation of the composite material, which involves preparing the periodic brominated polyethylene, adding the periodic brominated polyethylene and graphene to a twin-screw extruder in a metering and feeding manner, uniformly mixing in the extruder, carrying out extruding and granulating the blend to obtain blended particles, adding the blended particles to an injection molding machine, carrying out injection molding at an injection nozzle temperature of 100-200 degrees C, a pressure of 50-300 MPa and a mold temperature of 10-50 degrees C, and cooling to a rate of 2-40 degrees C/minute to obtain the composite material.