▎ 摘　　要

NOVELTY - Preparation of low temperature-resistant composite material comprises reacting dipropylene glycol diacrylate, succinic anhydride and m-phenylene diisocyanate to obtain resin prepolymer, mixing lignin, polyoxyethylene sorbitan monooleate and propylene glycol methyl ether acetate to obtain mixture, taking graphene oxide and hydrazine hydrate, adding mixture, stirring, adding silver ammonia solution, pyridine-nitrobenzoic acid salt, stirring, adding trimethylene carbonate and polyethylene glycol monomer, stirring, adding resin prepolymer, stirring, entering to mold and mold-pressing. USE - Method for preparing low temperature-resistant composite material (claimed). ADVANTAGE - The composite material has excellent mechanical property, good curing effect, stable structure and increased anti-brittleness property. DETAILED DESCRIPTION - Preparation of low temperature-resistant composite material comprises reacting dipropylene glycol diacrylate, succinic anhydride and m-phenylene diisocyanate at 150 degrees C for 70 minutes to obtain resin prepolymer, mixing lignin, polyoxyethylene sorbitan monooleate and propylene glycol methyl ether acetate for 2 hours to obtain mixture, taking graphene oxide and hydrazine hydrate, adding mixture, stirring for 4 hours, adding silver ammonia solution, pyridine-nitrobenzoic acid salt, stirring at 60 degrees C for 8 hours, adding trimethylene carbonate and polyethylene glycol monomer, stirring at 105 degrees C for 3 hours, adding resin prepolymer, stirring at 80 degrees C for 4 hours, entering to mold and mold-pressing.