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Copolymerization of Propene and Buta‐1,3‐diene in the Presence of Highly Hindered C 2 ‐Symmetric Zirconocene‐Based Catalyst
Author(s) -
Pragliola Stefania,
Costabile Chiara,
Di Bartolomeo Francesca,
Longo Pasquale
Publication year - 2004
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200400038
Subject(s) - propene , methylaluminoxane , cyclopentane , diene , cyclopropane , catalysis , metallocene , chemistry , polymer chemistry , medicinal chemistry , organic chemistry , polymerization , ring (chemistry) , polymer , natural rubber
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.