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Double Stereodifferentiation in the Formation of Isotactic Polypropylene at Chiral (C 5 H 4 CHMePh) 2 ZrCl 2 /Methylalumoxane Catalysts
Author(s) -
Erker Gerhard,
Nolte Rainer,
Tsay YiHung,
Krüger Carl
Publication year - 1989
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.198906281
Subject(s) - tacticity , materials science , propene , polymerization , polymer chemistry , polypropylene , polymer , metallocene , catalysis , transition metal , polymer science , chemistry , composite material , organic chemistry
The chirality of the transition metal complex and of the end of the growing chain promote the formation of block polymers of isotactic polypropylenes during the polymerization of propene at rac ‐ 1 /methylalumoxane catalysts. If, on the other hand, rac ‐ 1 is replaced by meso ‐ 1 , only one kind of isotactic polypropylene is obtained (chain end control).