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Lanthanidocene Catalysts for the Homo‐ and Copolymerization of Ethylene with Butadiene
Author(s) -
Boisson Christophe,
Monteil Vincent,
Ribour David,
Spitz Roger,
Barbotin Fanny
Publication year - 2003
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200350037
Subject(s) - copolymer , ethylene , 1,3 butadiene , polymer chemistry , catalysis , silylene , alkylation , chemistry , aluminium , organic chemistry , polymer , silicon
Alkylation of lanthanidocene chloride complexes was performed with BuLi, Mg(Bu)(Oct), or an equimolar mixture of BuLi and AlH( i Bu) 2 . In the case of the latter, chain transfer reactions were observed between neodymium and aluminium, and higher activities were obtained. The use of the silylene‐bridged complex, [Me 2 Si(3‐Me 3 SiC 5 H 3 ) 2 ]NdCl, in combination with BuLi and AlH( i Bu) 2 provided an efficient and unique catalyst for the copolymerization of ethylene with butadiene. Copolymers with high butadiene contents (up to 62 mol‐%) were synthesized. The microstructure of butadiene units was mostly trans ‐1,4, and copolymers exhibited a strong alternating character. The influence of butadiene content on the thermal properties of the copolymers was also investigated.Copolymerization of ethylene with butadiene using 4 /BuLi/AlH( i Bu) 2 (▪) and 2 /BuLi/AlH( i Bu) 2 (▴).