High density polyethylene compositions and articles thereof

A method of making a polyethylene composition, the method comprising:

• a. Introducing ethylene, an optional comonomer, a diluent, and a catalyst to a loop reactor under conditions sufficient to produce a slurry comprising the polyethylene composition;
• b. continuously or periodically discharging a portion of the slurry from the loop reactor as an effluent comprising the polyethylene composition;
• and
• c. flashing the effluent to vaporize the diluent and thereby form a concentrated effluent comprising the polyethylene composition;
• wherein the polyethylene composition comprises 80 wt % or greater ethylene-derived units and has density within the range from 0.940 to 0.975 g/cm3;
• melt index (MI, 2.16 kg loading, 190° C.) within the range from 0.5 g/10 min to 2.5 g/10 min;
• high load melt index (HLMI, 21.6 kg loading, 190° C.) within the range from 60 g/10 min to 150 g/10 min;
• melt index ratio (MIR, defined as HLMI/MI) within the range from 50 to 100;
• and a crossover frequency (COF) in accordance with the following:
• COF>−0.00015*(Mw)+80 (where COF is in rad/s and Mw is weight-average molecular weight in g/mol).