| abstract |
A polyethylene composition is disclosed. The composition includes a single site multimodal resin A and a single site multimodal resin B, and the resin A is different from the resin B in terms of molecular weight, monomer composition, density, long chain branching concentration or long chain branching distribution, Or in their combinations. Also disclosed is a method of producing a polyethylene composition. This method involves polymerizing ethylene or a mixture of ethylene and a C 3 to C 10 α-olefin in the presence of two or more single site catalysts to form a first multimodal resin, and in the presence of the same catalyst. Continuing polymerization at different hydrogen concentrations, or different monomer compositions, or at different temperatures to form a second multimodal resin. |