▎ 摘　　要

NOVELTY - Polyethylene long chain of graphene is represented by (I) is chemically bonded. USE - Polyethylene long chain of graphene. ADVANTAGE - The polyethylene long chain of graphene improve thermal conductivity and mechanical property. DETAILED DESCRIPTION - Polyethylene long chain of graphene is represented by (I) is chemically bonded. An INDEPENDENT CLAIM is included for a method for preparing polyethylene long chain of graphene, which involves: (A) adding a closed reactor with a reflux condenser and a magnetic stirrer to an organic solvent and graphene, and replacing with nitrogen and stirring the mixture to 40-70 degrees C to obtain mixture; (B) mixing the obatined mixture with 2-isocyanatoethyl methacrylate and dibutyltin dilaurate and reacted under stirring for 20-90 minutes to obtain a solid product; (C) washing the obtained solid product with ethanol for three times and dried in a vacuum oven to obtain graphene on the surface chemically bonded methacrylate group; (D) sealing the reactor equipped with a reflux condenser and a magnetic stirrer is charged with n-hexane, graphene on the surface chemically bonded methacrylic acid group; (E) catalysing the Ziegler-Natta catalyst, heating at 60-90 degrees C and stirred under pressure of 0.1-1.5MPa for 1-4 hours and purged with nitrogen to obtain ethylene; (F) placing the obtained ethylene into reaction system to carried out for 1-4 hours, and then the reaction is terminated by adding ethanol to obtain a suspension; and (G) centrifuging the obtained suspension to separate the solid precipitate, washed with ethanol and dried in a vacuum oven to obtain chemically bonded polyethylene long chain of graphene.