Nodular copolymers comprising narrow MWD alpha-olefin copolymers coupled by non-conjugated dienes

摘要

A method of preparing a nodular polymer by preparing a copolymer chain and coupling it to a coupling agent. The coupling agent is a non-conjugated diene. Preferably the non-conjugated diene has both double bonds Ziegler catalyst polymerizable. The preferred product comprises a norbornadiene coupled ethylene copolymer wherein the ethylene copolymer has a &upbar& Mz/ &upbar& Mm of less than 2.0 and a &upbar& Mw/ &upbar& Mn of less than 1.8 before coupling.