| abstract |
Polyolefin products are provided comprising isotactic polypropylene backbones, polyethylene branched chains, and branched olefin copolymers optionally with one or more comonomers. The total comonomer content of the branched olefin copolymer is 0-20 mole%. In addition, the mass ratio of isotactic polypropylene to polyethylene ranges from 99.9: 0.1 to 50:50. Additionally, a) optionally copolymerizing ethylene with at least one copolymerizable monomer in a polymerization reaction under conditions sufficient to form a copolymer having an unsaturation of at least 40% of the chain end groups; b) copolymerizing the product of a) with propylene and optionally one or more copolymerizable monomers in a polymerization reactor under suitable polypropylene polymerization conditions using a chiral sterically fixed transition metal catalyst capable of producing isotactic polypropylene. ; And c) recovering the branched olefin copolymer. |