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“Living Polymers” on Polymerization with Extremely Productive Ziegler Catalysts
Author(s) -
Sinn Hansjörg,
Kaminsky Walter,
Vollmer HansJürgen,
Woldt Rüdiger
Publication year - 1980
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.198003901
Subject(s) - zirconium , polyethylene , polymer , catalysis , alkyl , ethylene , polymerization , polymer chemistry , molecule , atom (system on chip) , atom transfer radical polymerization , chemistry , materials science , organic chemistry , computer science , embedded system
At least 10000 polyethylene molecules per zirconium atom can be obtained with a Ziegler catalyst made up of Cp 2 ZrMe 2 and [Al(Me)O] n . Depending upon the conditions, the molecular weight of the polymer lies between 1 and 2. All the results available so far are in accord with the following concept: A molecule of organozirconium compound diffuses into an associate of aluminoxanes. H‐transfer leads to zirconium hydrides which add ethylene to form alkyl compounds and thus give rise to active sites.