Single reactor bimodal polyethylene with improved modulus for extrusion blow molding drum applications

A bimodal polyethylene composition having:

• a density (ρ) from 0.952 g/cm3 to 0.957 g/cm3 when measured according to ASTM D792-08, Method B;
• a high load melt index (I21) from 1.0 to 10 dg/min when measured according to ASTM D1238 at 190° C. and a 21.6 kg load;
• a peak molecular weight (Mp(GPC)) defined by the equation:
• Mp(GPC)<−2,805.3×MWD+102,688, wherein MWD is a molecular weight distribution defined by the equation:
• MWD=Mw(GPC)/Mn(GPC), Mw(GPC) is a weight average molecular weight of the bimodal polymer composition, and Mn(GPC) is a number average molecular weight of the bimodal polymer composition, and wherein Mp(GPC), Mw(GPC), and Mn(GPC) are measured using gel permeation chromatography (GPC), wherein the Mn(GPC) is greater than 28,000 g/mol
• a z-average molecular weight (Mz(GPC)) greater than 3,200,000 and less than or equal to 5,000,000 g/mol as measured using GPC;
• a ratio of the (Mz(GPC)) to the Mw(GPC) is from 8.5 to 10.5;
• a secant modulus (Es) defined by the equation:
• Es>−2,622+2,822×ρ+2.5×MFR5, wherein MFR5 is a ratio of the high load melt index (I21) to a melt index (I5) of the bimodal polyethylene composition measured according to ASTM D1238 at 190° C. and a 5.0 kg load;
• a secant modulus (Es) defined by the equation:
• Es>−4,570.6+4,883×ρ+3.1×MWD;
• or both.

A bimodal polyethylene composition having:

• a density (ρ) from 0.952 g/cm3 to 0.957 g/cm3 when measured according to ASTM D792-08, Method B;
• a high load melt index (I21) from 1.0 to 10 dg/min when measured according to ASTM D1238 at 190° C. and a 21.6 kg load;
• a peak molecular weight (Mp(GPC)) defined by the equation:
• Mp(GPC)<−2,805.3×MWD+102,688, wherein MWD is a molecular weight distribution defined by the equation:
• MWD=Mw(GPC)/Mn(GPC), Mw(GPC) is a weight average molecular weight of the bimodal polymer composition, and Mn(GPC) is a number average molecular weight of the bimodal polymer composition, and wherein Mp(GPC), Mw(GPC), and Mn(GPC) are measured using gel permeation chromatography (GPC), wherein the Mn(GPC) is greater than 28,000 g/mol
• a z-average molecular weight (Mz(GPC)) greater than 3,200,000 and less than or equal to 5,000,000 g/mol as measured using GPC;
• and
• a ratio of the (Mz(GPC)) to the Mw(GPC) is from 8.5 to 10.5;
• wherein a secant modulus (Es) of the bimodal polyethylene composition is greater than 965 MPa.