Copolymns. of propene and buta-1,3-diene performed in the presence of rac-[CH2(3-tert-butyl-1-indenyl)2]ZrCl2 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 amts., are also obtained. The presence of butadiene would be responsible for some regio-irregular 2,1-inserted propene units, which at high temps. give rearrangement to 3,1 units.
Copolymerization of propene and 1,3-butadiene in the presence of highly hindered C2 - symmetric zirconocene based catalyst
PRAGLIOLA, Stefania;COSTABILE, Chiara;LONGO, Pasquale
2004
Abstract
Copolymns. of propene and buta-1,3-diene performed in the presence of rac-[CH2(3-tert-butyl-1-indenyl)2]ZrCl2 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 amts., are also obtained. The presence of butadiene would be responsible for some regio-irregular 2,1-inserted propene units, which at high temps. give rearrangement to 3,1 units.File in questo prodotto:
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