New half-sandwich metallocene catalysts for polyethylene and polystyrene

A new type of half-sandwich metallocene catalysts for the polymerization of ethylene and styrene, Cp*MCl(DEA-R) (DEA = (OCH2CH2)(2)N, R = Me, M = Ti (1); R = Me M = Zr (2); R = n-Bu, M = Ti (3)), was prepared by the reaction of corresponding N-alkyl-N,N-diethanolamine with Cp*MCl3 in the presence of triethylamine. Compounds 1-3 are slightly air-sensitive and thermally unstable. All catalyst systems show moderate activities in ethylene polymerization and especially the 2/MMAO system gives PE with broad molecular weight distribution at all polymerization temperatures. In addition, 1/MMAO and 3/MMAO show fairly good activities in sPS polymerization in the order 3/MMAO > 1/MMAO. (C) 2001 Elsevier Science B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE SA
Issue Date
2001-09
Language
ENG
Keywords

M = TI; OLEFIN POLYMERIZATION; TITANIUM COMPLEXES; STEREOSPECIFIC POLYMERIZATION; SYNDIOSPECIFIC POLYMERIZATION; PROPYLENE POLYMERIZATION; SYNDIOTACTIC POLYSTYRENE; STEREOCHEMICAL CONTROL; METAL-CATALYSTS; MAO CATALYST

Citation

JOURNAL OF ORGANOMETALLIC CHEMISTRY, v.634, no.1, pp.19 - 24

ISSN
0022-328X
DOI
10.1016/S0022-328X(01)01105-6
URI
http://hdl.handle.net/10203/2210
Appears in Collection
CH-Journal Papers(저널논문)
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