## Abstract 1‐Butene polyinsertion promoted by two typical __C__~2~‐symmetric zirconocene catalysts (i.e. __rac__‐ethylenebis(1‐indenyl)ZrCl~2~ (1) and __rac__‐dimethylsilylbis(1‐indenyl)ZrCl~2~) (2) was investigated under both hydrooligomerization and polymerization conditions and compared with th
Polymerization of 3-methyl-1-butene promoted by metallocene catalysts
✍ Scribed by Anna Borriello; Vincenzo Busico; Roberta Cipullo; John C. Chadwick; Olof Sudmeijer
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 429 KB
- Volume
- 17
- Category
- Article
- ISSN
- 1022-1336
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✦ Synopsis
Abstract
3‐Methyl‐1‐butene was polymerized in the presence of a number of homogeneous metallocene catalysts (co‐catalyst methylalumoxane). Contrary to literature reports, it was found that even the simplest C~2~‐symmetric metallocenes promote the isotactic polymerization of this monomer with reasonable productivities. Quite surprisingly, a prevailingly isotactic polymer was also obtained in the presence of C~s~‐symmetric metallocenes, which are instead syndiotactic‐specific in propene polymerization.
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Selective polymerization of 1-butene in C 4 fractions has been investigated using a supported Ziegle~Natta catalyst. Catalytic activity depends on the pre-treatment of the C 4 cut as well as on the composition. Isobutene retards the polymerization. Tacticity of the polymers can be influenced by ethy