Polyolefin Compositions and Methods of Production Thereof

A method for producing a functionalized polymer, comprising:

• contacting a styrenic block copolymer and ethylene in the presence of a metathesis catalyst under conditions sufficient to produce a vinyl terminated polystyrene having an unsaturation functionality of at least 0.7 and a MWD of about 1.5 or less;
• and
• grafting the vinyl terminated polystyrene to a polyolefin to form a polyolefin/polystyrene graft copolymer.

A method for producing a functionalized polymer, comprising:

• contacting a styrenic block copolymer and ethylene in the presence of a metathesis catalyst under conditions sufficient to produce a vinyl terminated polystyrene having a functionality of at least 0.7 and a MWD of about 1.5 or less;
• and
• contacting the vinyl terminated polystyrene with ethylene monomer in the presence of a polymerization catalyst system to form a polyethylene/polystyrene copolymer.

-37. (canceled)