| 摘要 |
Substantially random ethylene copolymers containing at least 3.0 mole percen t of geminally disubstituted olefin monomers are described. The geminally disubstituted olefin monomers can be represented by the generic formula R1 = R2(R3)(R4), where R1 is CH2, R2 is C, and R3 and R4 are, independently, essentially linear hydrocarbyl groups having from 1 to 30 carbon atoms, or more, and containing one carbon atom bound directly to R2. The copolymers ca n be prepared by coordination polymerization by means of contacting at least o ne geminally disubstituted olefin monomer and ethylene, optionally with one or more other coordination polymerizable monomers, with a catalyst system comprising a monocyclopentadienyl, heteroatom-containing Group 4 transition metal catalyst component.
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