▎ 摘　　要

NOVELTY - A degradable environmentally-friendly plastic comprises 43-45 pts. wt. polyvinyl alcohol, 33-35 pts. wt. butyl stearate, 15-25 pts. wt. stearic acid amide, 16-18 pts. wt. talcum powder, 17-19 pts. wt. graphene, 20-30 pts. wt. styrene, 23-25 pts. wt. polyurethane, 15-25 pts. wt. acrylonitrile, 22-24 pts. wt. N-phenylmaleimide and 13-15 pts. wt. inorganic pigment. USE - Degradable environmentally-friendly plastic. ADVANTAGE - The degradable environmentally-friendly plastic has a reasonable structure, and is non-toxic and has no irritating smell. In the plastic, lead, cadmium, polybrominated biphenyl and polybrominated diphenyl ether are not detected, and the content of mercury and chromium is significantly reduced after testing. At the same time, styrene, acrylonitrile and N-phenylmaleimide are added during preparation of the plastic to effectively improve the heat resistance of the plastic, and graphene is added to effectively improve the toughness of the plastic. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the plastic, which involves (i) adding polyvinyl alcohol, butyl stearate, stearic acid amide, styrene and polyurethane according to the proportion to a reaction container, reacting for 1.5-2.5 hours under the condition of temperature of 65-75℃, (ii) adding acrylonitrile and N-phenylmaleimide to the container, adjusting the temperature to 70-75℃, and reacting for 1-1.5 hour, and (iii) finally stirring the obtained mixture, slowly pouring talcum powder and inorganic pigment, stirring, heating at 120-130℃, and reacting for 3.5-4 hours.