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Alternating copolymerization of ethylene and propene with the [ethylene(1‐indenyl)(9‐fluorenyl)]zirconium dichloridemethylaluminoxane catalyst system
Author(s) -
Jin Jizhu,
Uozumi Toshiya,
Sano Tsuneji,
Teranishi Toshiharu,
Soga Kazuo,
Shiono Takeshi
Publication year - 1998
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/(sici)1521-3927(19980701)19:7<337::aid-marc337>3.0.co;2-8
Subject(s) - methylaluminoxane , propene , ethylene , copolymer , zirconium , polymer chemistry , tacticity , metallocene , catalysis , materials science , ziegler–natta catalyst , chemistry , organic chemistry , polymerization , polymer , metallurgy , composite material
The copolymerization of ethylene and propene was conducted at −40°C with the [ethylene(1‐indenyl)(9‐fluorenyl)]zirconium dichloride‐methylaluminoxane catalyst system, and the microstructure of the resulting copolymers was analyzed in detail by 13 C NMR. The content of alternating [EP] sequences increased markedly with an increase in the feed ratio of propene to ethylene. A poly(ethylene‐ co ‐propene) with a proportion of [EP] sequences over 95% was thus obtained under appropriate copolymerization conditions. It was also demonstrated that the alternating ethylene‐propene copolymer is stereoregular and isotactic.