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Alternating Ethylene–Norbornene Copolymerization Catalyzed by Cationic Half‐Sandwich Scandium Complexes
Author(s) -
Li Xiaofang,
Baldamus Jens,
Hou Zhaomin
Publication year - 2005
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200461971
Subject(s) - scandium , cationic polymerization , norbornene , copolymer , ethylene , catalysis , polymer chemistry , materials science , chemistry , organic chemistry , polymer , composite material , metallurgy
Rare activity of an active rare‐earth‐metal catalyst is observed in the alternating copolymerization of ethylene and norbornene. The reaction yields exclusively the alternating copolymer in the presence of both monomers and affords poly(ethylene‐ alt ‐norbornene)‐ b ‐polyethylene block copolymers when a relatively small quantity of norbornene is used under a constant flow of ethylene (see scheme).