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Isospecific polymerization of α-olefins in the presence of metallocomplex catalysts fixed on graphite

✍ Scribed by P.M. Nedorezova; N.M. Galashina; V.I. Tsvetkova; T.A. Sukhova; S.L. Saratovskikh; O.N. Babkina; F.S. Dyachkovskii

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
540 KB
Volume
32
Category
Article
ISSN
0014-3057

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✦ Synopsis

Studies of activity and stereospecificity in polymerizations of propylene and butene-I with several metal-complex catalysts fixed on a graphite surface are reported. High catalytic activity was observed at a strictly determined Ti:graphite ratio. Maximum stereospecificity is observed at the maximum of catalytic activity. Characterization of the catalyst obtained from the interaction of TiClr(C~H&AlCl with graphite by chromatographic, polarographic, X-ray and ESR techniques was directed to the origin of the modifying effect of graphite. These results indicated the formation of stable metal complexes containing Ti compounds with TiClH5 moieties in the sites of crystal-lattice defects. Some electrophysical and mechanical properties of polypropylene-graphite sample are also presented.

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