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Copolymerization of propene and 1‐hexene using metallocene amide compounds
Author(s) -
Kim Il
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(19980601)19:6<299::aid-marc299>3.0.co;2-l
Subject(s) - methylaluminoxane , metallocene , propene , 1 hexene , amide , copolymer , polymer chemistry , hexene , toluene , chemistry , catalysis , materials science , organic chemistry , polymerization , polymer
Copolymerization of propene and 1‐hexene has been carried out at 30°C in toluene under atmospheric pressure by using three isospecific metallocene amide compounds, rac ‐(EBI)Zr(NMe 2)2 (EBI = ethylenebis(1‐indenyl), rac ‐ 1 ), rac ‐(EBI)Zr(NC 4 H 8)2 ( rac ‐ 2 ), and rac ‐Me 2 Si(1‐C 5 H 2 ‐2‐Me‐4‐ t ‐Bu) 2 Zr(NMe 2)2 ( rac ‐ 3 ), in the presence of methylaluminoxane (MAO) or [Ph 3 C][B(C 6 F 5 ) 4 ]. The rate enhancements in the presence of 1‐hexene were recorded as a function of the catalytic systems. The incorporation of 1‐hexene decreases in the following order: rac ‐ 2 /MAO > rac ‐ 3 /Al( i ‐Bu) 3 /[Ph 3 C][B(C 6 F 5 ) 4 ] > rac ‐ 1 /MAO. All copolymers investigated in this study have a nearly random sequence distribution.