The invention relates to high-strength durable
polylactic acid and a preparation method thereof, belongs to the technical field of composite materials, and aims to solve the technical problems of lowmechanical strength and poor durability of
polylactic acid in the prior art. The high-strength durable
polylactic acid is prepared from 100 parts by weight of polylactic acid, 5 to 8 parts by weight of poly(butylene
adipate-co-terephthalate) resin, 3 to 5 parts by weight of 2-(3,4-dihydroxyphenyl)
ethylamine, 4.5 to 7.5 parts by weight of
polycarbonate, 1 to 2 parts by weight of
wood flour, 2 to 4parts by weight of
silane coupling agent, 1 to 3 parts by weight of
antioxidant, 1.5 to 3 parts by weight of
polyethylene wax, 2.5 to 3 parts by weight of
ethylene-
vinyl acetate copolymer, 1 to 2 parts by weight of
wollastonite powder, 0.5 to 1.5 parts by weight of
ultraviolet light absorber, 1 to 3 parts by weight of
sodium phosphite and 0.5 to 1 part by weight of heat stabilizer. The high-strength durable polylactic acid has high mechanical performance and high durability.