▎ 摘　　要

NOVELTY - A polyethylene thermal coating comprises 12-15 pts. wt. styrene-maleic anhydride copolymer, 6-10 pts. wt. propargyl alcohol, 90-100 pts. wt. tetrahydrofuran, 4-7 pts. wt. graphene, 16-20 pts. wt. nano-silica, 0.2-0.3 pt. wt. silane coupling agent KH560, 700-800 pts. wt. dimethylformamide, 4-5 pts. wt. sodium azide, 0.04-0.05 pt. wt. aluminum chloride, 2-3 pts. wt. 1.6-2% sodium ascorbate solution, 2-3 pts. wt. 1.8-2% copper sulfate solution, and 120-130 pts. wt. high density polyethylene. USE - Polyethylene thermal coating. ADVANTAGE - The coating is stable, and has good heat radiating effect. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of polyethylene thermal coating comprising mixing styrene-maleic anhydride copolymer, propargyl alcohol, and tetrahydrofuran, incubating with stirring at 50-60 degrees C for 10-16 hours, vacuum distilling, drying under vacuum pressure to obtain alkynyl copolymer, adding graphene and nano-silica, mixing, milling for 30-40 minutes, adding toluene, ultrasonically dispersing for 2-3 hours, adding silane coupling agent KH560, heating at 86-90 degrees C, stirring for 10-12 hours, cooling, filtering, drying under vacuum pressure to obtain silanized nanoparticles, adding dimethylformamide, ultrasonically dispersing for 2-3 hours, adding sodium azide, and aluminum trichloride, stirring at 30-35 degrees C for 24-25 hours, filtering, washing with water, drying under vacuum pressure to obtain azide nanoparticles, adding dimethyl formamide, bubbling with nitrogen gas for 30-40 minutes, adding 2-3% sodium ascorbate solution, and 2-3% copper sulfate solution, reacting at 76-80 degrees C for 20-24 hours, suction filtering filter cake with distilled water, successively washing twice or thrice with acetone, drying under vacuum pressure to obtain graft nanoparticles, adding remaining raw materials, stirring, feeding into twin-screw extruder, melt extruding, cooling, crushing, and sieving.