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Evidence of Intramolecular Cyclization in Copolymerization of Ethylene with 1,3‐Butadiene: Thermal Properties of the Resulting Copolymers
Author(s) -
Monteil Vincent,
Spitz Roger,
Barbotin Fanny,
Boisson Christophe
Publication year - 2004
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.200300206
Subject(s) - copolymer , cyclohexane , intramolecular force , polymer chemistry , silylene , ethylene , polymer , materials science , chemistry , organic chemistry , silicon , catalysis
Summary: Ethylene and butadiene were copolymerized with a silylene‐bridged bis(fluorenyl) complex {[Me 2 Si(C 13 H 8 ) 2 ]NdCl} ( 1 ) in combination with various alkylating agents (BuLi/AlH( i Bu) 2 , (Bu)MgCl, Mg(Bu)(Oct)). Copolymers have a unique microstructure since they contain 1,2‐cyclohexane rings and unsaturations along the polymer chain. An intramolecular mechanism was proposed for the formation of six‐membered rings. The influence of these cyclic structures on thermal properties of the copolymers has been investigated.Proposed mechanism for formation of 1,2‐cyclohexane rings.