Methods for making polyolefins

A method for making a polyolefin composition, the method comprising:

• contacting one or more olefinic monomers in a single reactor containing a bicomponent catalyst system comprising a first catalyst component and a second catalyst component each having a catalyst productivity and a chain transfer agent response;
• the single reactor being having a chain transfer agent concentration;
• the chain transfer agent response of the second catalyst component having a different sensitivity than that of the first catalyst component;
• effectuating the polymerization of the olefinic monomers to produce an olefin polymer having a melt flow ratio;
• wherein the first catalyst component produces a high molecular weight (HMW) fraction of the polymer, and the second catalyst component produces a low molecular weight (LMW) fraction of the polymer;
• altering the concentration of the chain transfer agent present in the reactor to move peaks of the HMW and LMW fractions of the polymer in a same direction, the altering also causing the melt flow ratio of the polymer to change in a first direction;
• adjusting at least one condition in the reactor to achieve a change in molecular weight split wherein the change in split causes the melt flow ratio of the polymer to reverse trend and change in a second direction.