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UV‐Visible Spectroscopic Study of rac ‐Et(Ind) 2 ZrCl 2 /Aluminoxanes
Author(s) -
Wang Qi,
Song Lixin,
Zhao Yan,
Feng Linxian
Publication year - 2001
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 - 10.1002/1521-3927(20010901)22:13<1030::aid-marc1030>3.0.co;2-r
Subject(s) - ionic bonding , zirconium , materials science , polymerization , polymer chemistry , chemistry , inorganic chemistry , organic chemistry , polymer , ion , composite material
The UV‐visible spectroscopic study of the interaction between rac ‐Et(Ind) 2 ZrCl 2 and different aluminoxanes, such as isobutylaluminoxane (BAO) and ethyl(isobutyl)aluminoxane (EBAO), was conducted under normal polymerization conditions. UV‐visible absorption spectra of rac ‐Et(Ind) 2 ZrCl 2 /aluminoxanes were correlated with the formation of ionic zirconium species. The influence of different aluminoxanes on the tightness of the metallocenium‐aluminoxane ionic pairs was interpreted in terms of the aluminoxane structure. The loose ionic pairs formed in the EBAO system causes a fast decaying kinetic profile, advantageous for copolymerization.