Premium
A new mechanism for the transition metal catalyzed copolymerization of conjugated dienes with olefins: The double coordination mechanism
Author(s) -
Robert P.,
Spitz R.
Publication year - 1993
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19930660123
Subject(s) - mechanism (biology) , conjugated system , copolymer , catalysis , transition metal , chemistry , polymer chemistry , combinatorial chemistry , organic chemistry , polymer , physics , quantum mechanics
We have focused our interest on the ethylene‐ butadiene copolymerizations catalyzed with Ziegler‐Natta type catalysts. The catalysts used are MgCl 2 supported titanium catalysts. The main features of these copolymerizations (stereospecificity of the butadiene enchainments, multiblock structure, gel formation) cannot be rationalized on the basis of the Cossee mechanism. We propose a new model: The double coordination mechanism. It explains all the phenomena observed. Experimental confirmations will be presented in this paper.