| abstract |
Branched polyolefin copolymers containing olefinic bonds preferably not associated with end groups, especially elastomers, may be made by reacting ethylene and a nonconjugated diene in the presence of a selected iron catalyst which can oligomerize ethylene, and transition metal containing copolymerization catalyst which can copolymerize ethylene, α-olefins and nonconjugated dienes. The resulting polyolefins are useful, for example, as curable elastomers or semicrystalline polymers. |