▎ 摘　　要

NOVELTY - A polyethylene nanocomposite is produced by polymerizing ethylene in a polymerization mixture comprising graphene-layered double hydroxide nanocomposite, metallocene catalyst, alkylaluminoxane co-catalyst, and organic solvent to form polyethylene nanocomposite, where polyethylene nanocomposite comprises graphene-layered double hydroxide nanocomposite dispersed in a matrix of polyethylene; and graphene-layered double hydroxide nanocomposite comprises layered double hydroxide and 1-7 wt.% graphene relative to total weight of graphene-layered double hydroxide nanocomposite. USE - Production of polyethylene nanocomposite for plastic bags and sheets, plastic wrap, stretch wrap, pouches, toys, covers, lids, pipes, buckets and containers, cable and other electronic coverings, geomembranes, and flexible tubing. ADVANTAGE - The individual layered double hydroxide particles (microstructure) may agglomerate or otherwise adhere to one another, and share an interconnected outer boundary, to form a distinct agglomerated macrostructure. The layered double hydroxide particles are in the form of nanoplatelets which are stacked or which overlap, forming a lamellar or scale-like morphology. Preferably, the layered double hydroxide phase of the graphene-layered double hydroxide nanocomposite is composed of an arrangement of stacked/overlapping hexagonal nanoplatelets which are agglomerated/adhered to one another to form a lamellar or scale-like morphology. This lamellar or scale-like morphology may advantageously prevent agglomeration of the graphene phase and may enhance the catalyst activity. The presence of the graphene-layered double hydroxide nanocomposite in the polymerization mixture may increase the activity of the metallocene catalyst, resulting in a more efficient process even at lower catalyst loadings, when compared to cases where no nanofiller is employed or where the nanofiller is a non-composited layered double hydroxide.