Patent ID: 8039556

Claim:
A method of making a composition comprising a high molecular weight component and a low molecular weight component, the method comprising: (i) blending the high molecular weight component and the low molecular weight component to form the composition; or (ii) producing the high molecular weight component and the low molecular weight component in a multiple polymerization reactor system comprising at least two polymerization reactors configured in series or in parallel, and combining the high molecular weight component and the low molecular weight component in the reactor system to form the composition; or (iii) both (i) and (ii); wherein: a) the high molecular weight component comprises an ethylene copolymer characterized by a M w /M n less than or equal to about 3.5, a substantially constant short-chain branching (SCB) profile across the molecular weight distribution, and a number of short-chain branches (SCB) per 1000 backbone carbon atoms from about 4 to about 8; and b) the low molecular weight component comprises an ethylene homopolymer characterized by a M w from 25 to 60 kg/mol.