✦ LIBER ✦
Copolymerization of Propene and Buta-1,3-diene in the Presence of Highly Hindered C2-Symmetric Zirconocene-Based Catalyst
✍ Scribed by Stefania Pragliola; Chiara Costabile; Francesca Di Bartolomeo; Pasquale Longo
- Publisher
- John Wiley and Sons
- Year
- 2004
- Tongue
- English
- Weight
- 123 KB
- Volume
- 25
- Category
- Article
- ISSN
- 1022-1336
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✦ Synopsis
Abstract
Summary: Copolymerizations of propene and buta‐1,3‐diene performed in the presence of rac‐[CH~2~(3‐tert‐butyl‐1‐indenyl)~2~]ZrCl~2~ and methylaluminoxane (MAO) have been investigated. Buta‐1,3‐diene gives prevailingly primary coordination to the metal, producing overall 1,2 units. Cyclopropane and cyclopentane rings, although in low amounts, are also obtained. The presence of butadiene would be responsible for some regioirregular 2,1‐inserted propene units, which at high temperatures give rearrangement to 3,1 units.
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