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Evidence of Intramolecular Cyclization in Copolymerization of Ethylene with 1,3-Butadiene: Thermal Properties of the Resulting Copolymers

✍ Scribed by Vincent Monteil; Roger Spitz; Fanny Barbotin; Christophe Boisson

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
119 KB
Volume
205
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

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.

magnified imageProposed mechanism for formation of 1,2‐cyclohexane rings.

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