▎ 摘　　要

NOVELTY - Preparing graphene reinforced polyethylene terephthalate utilizing injection molding, comprises: compounding polyethylene terephthalate with dispersed graphene nanoplatelets using a master-batch method to obtain at least one master-batch pellet, where the master-batch method is effectively dispersing the graphene nanoplatelets within the polyethylene terephthalate with a lower graphene nanoplatelet content to yield an improved dispersion as compared to higher graphene nanoplatelet content master-batches; and forming polyethylene terephthalate-graphene nanoplatelet nanocomposities. USE - The method is useful for preparing graphene reinforced polyethylene terephthalate (claimed), which is useful for fibers, packaging and engineering molding. ADVANTAGE - The method utilizes: the ultrasound-assisted extrusion, which increases toughness of the polyethylene terephthalate with no effect on Young's modulus; and strain-induced crystallization, which improves at least one mechanical property of the polyethylene terephthalate as compared to thermally-induced crystallization (claimed). DETAILED DESCRIPTION - Preparing graphene reinforced polyethylene terephthalate utilizing injection molding, comprises: compounding polyethylene terephthalate with dispersed graphene nanoplatelets using a master-batch method to obtain at least one master-batch pellet, where the master-batch method is effectively dispersing the graphene nanoplatelets within the polyethylene terephthalate with a lower graphene nanoplatelet content to yield an improved dispersion as compared to higher graphene nanoplatelet content master-batches; and forming polyethylene terephthalate-graphene nanoplatelet nanocomposities, where the polyethylene terephthalate-graphene nanoplatelet nanocomposites comprise weight fractions of 0.5-15%.