Ring-opening Ziegler olefin polymerization catalysts and polymers therefrom
AssigneeNorthwestern University
InventorsTobin J. Marks, Xinmin Yang, Li Jia
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Abstract
The regiospecific (1,2-Me.sub.2 C.sub.5 H.sub.3).sub.2 ZrMe.sup.+ MeB(C.sub.6 F.sub.5).sub.3 - mediated ring-opening polymerization of methylenecyclobutane and its copolymerization with ethylene to polyolefins of microstructure --{CH.sub.2 CH.sub.2 CH.sub.2 C(CH.sub.2)]--.sub.n and {--[CH.sub.2 CHR]--.sub.x [CH.sub.2 CH.sub.2 CH.sub.2 C(CH.sub.2)]--.sub.y }.sub.n, respectively is disclosed.
Claims7
A polymer having a repeating unit selected from the group consisting of ##STR14## where R, R.sup.1 =alkyl group (C=1-5), phenyl group, or H, and said polymer has a molecular weight of at least about 83000.
A copolymer having the repeating unit --AB-- where A is an .alpha.-olefin and B is an exo-methylene substituted cyclic organic compound and said polymer has a molecular weight of at least about 89,000.
Dependencies are inferred from the claim text.