Alk‐1‐ene Polymerization in the Presence of a Monocyclopentadienyl Zirconium(IV) Acetamidinate Catalyst: Microstructural and Mechanistic Insights
Macromolecular rapid communications, 2007•Wiley Online Library
Abstract Suitably activated,(Cp*){N (tBu) C (Me) N (Et)} ZrMe2 is known to initiate the
'living'and isotactic‐selective polymerization of alk‐1‐enes, and it can be used to synthesize
block copolymers and stereoblock polymers. We report a full molecular kinetic investigation
of propene, but‐1‐ene, and hex‐1‐ene polymerization with a MAO‐activated catalyst
system. By combining NMR microstructural polymer analysis with QM modeling of the active
species, the complicated regio‐and stereochemistry of the polyinsertion process, as well as …
'living'and isotactic‐selective polymerization of alk‐1‐enes, and it can be used to synthesize
block copolymers and stereoblock polymers. We report a full molecular kinetic investigation
of propene, but‐1‐ene, and hex‐1‐ene polymerization with a MAO‐activated catalyst
system. By combining NMR microstructural polymer analysis with QM modeling of the active
species, the complicated regio‐and stereochemistry of the polyinsertion process, as well as …
Abstract
Suitably activated, (Cp*){N(tBu)C(Me)N(Et)}ZrMe2 is known to initiate the ‘living’ and isotactic‐selective polymerization of alk‐1‐enes, and it can be used to synthesize block copolymers and stereoblock polymers. We report a full molecular kinetic investigation of propene, but‐1‐ene, and hex‐1‐ene polymerization with a MAO‐activated catalyst system. By combining NMR microstructural polymer analysis with QM modeling of the active species, the complicated regio‐ and stereochemistry of the polyinsertion process, as well as the active chain‐transfer pathways, are investigated. The perspectives and limitations of this catalyst for application in (stereo)block polymerizations are discussed.
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