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Polymerization of ethylene using metallocene and aluminoxane systems
Author(s) -
Justino Jorge,
Dias A. Romão,
Ascenso José,
Marques Maria M.,
Tait Peter J. T.
Publication year - 1997
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/(sici)1097-0126(199712)44:4<407::aid-pi844>3.0.co;2-1
Subject(s) - methylaluminoxane , metallocene , gel permeation chromatography , polymer chemistry , polymerization , materials science , polyethylene , differential scanning calorimetry , post metallocene catalyst , ethylene , chemistry , catalysis , organic chemistry , polymer , composite material , physics , thermodynamics
This paper describes ethylene polymerization using a number of metallocene and aluminoxane catalyst systems, Cp 2 MR 2 and methylaluminoxane [M=Zr, W, Nb; R=Cl, CH 3 ]. Two types of methylaluminoxane, MAO (1) and MAO (2), were used as cocatalysts. The polymerization activities of the complexes Cp 2 WCl 2 and Cp 2 NbCl 2 were compared with that of Cp 2 ZrCl 2 . The Nb and W complexes were found to be less active than the Zr complex. Polyethylene characterization was also carried out by the following methods: gel permeation chromatography (GPC), differential scanning calorimetry (DSC) and nuclear magnetic resonance (NMR). ©1997 SCI
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