▎ 摘　　要

NOVELTY - Modified thermotropic liquid crystal polyester composition comprises 100 pts. wt. liquid crystal polyester, 20-30 pts. wt. ethylene-vinyl acetate copolymer, 5-10 pts. wt. dibutyl phthalate, and 0.05-0.25 pts. wt. graphene oxide. USE - Used as modified thermotropic liquid crystal polyester composition. ADVANTAGE - The composition improves the toughness of the liquid crystal polyester without reducing its strength and heat resistance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the modified thermotropic liquid crystal polyester composition, comprising (i) adding graphene suspension in deionized water, fully stirring to obtain suspension, carrying out suspension ultrasonic treatment to the obtained suspension for 30-60 minutes and drying, and(ii) taking liquid crystal polyester, ethylene-vinyl acetate copolymer and dibutyl phthalate, heating at 320-45 degrees C, melting and mixing uniformly, adding graphene oxide obtained in the step (i), extruding and granulating the mixture, and drying.