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Synthesis of ethylene‐ α ‐olefin alternating copolymers with Et(1‐Ind)(9‐Flu)ZrCl 2 ‐MAO catalyst system
Author(s) -
Uozumi Toshiya,
Ahn CheolHee,
Tomisaka Mikio,
Jin Jizhu,
Tian Gonglu,
Sano Tsuneji,
Soga Kazuo
Publication year - 2000
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20000901)201:14<1748::aid-macp1748>3.0.co;2-i
Subject(s) - copolymer , ethylene , propene , polymer chemistry , 1 hexene , catalysis , olefin fiber , chemistry , triad (sociology) , reactivity (psychology) , organic chemistry , polymer , medicine , psychology , alternative medicine , pathology , psychoanalysis
Copolymerizations of ethylene and α ‐olefins (4‐methyl‐1‐pentene, 1‐hexene, 1‐decene and 1‐hexadecene) were carried out with Et(1‐Ind)(9‐Flu)ZrCl 2 ‐MAO as the catalyst system. The degree of alternation in the resulting copolymers is higher than 92.1% for all the copolymers and close to 100% for ethylene‐1‐decene copolymer. Copolymerization behaviours focusing on the misinsertions during the polymerizations are investigated in detail from dyad and triad distributions estimated by 13 C NMR analysis of copolymers. A reactivity ratio, r B E , was obtained for ethylene‐1‐hexene copolymers using a simplified two sites alternating mechanism and found to be 8.7, which is the same order of that reported in ethylene‐propene copolymerizations with Me 2 C(3‐RCp)(Flu)ZrCl 2 ‐MAO as the catalyst system.