Isoprene–Styrene Chain Shuttling Copolymerization Mediated by a Lanthanide Half‐Sandwich Complex and a Lanthanidocene: Straightforward Access to a New Type of Thermoplastic Elastomers1. (25th March 2014)

• Record Type: Journal Article
• Authors: Valente, Andreia; Stoclet, Gregory; Bonnet, Fanny; Mortreux, André; Visseaux, Marc; Zinck, Philippe
• Is Part Of: Angewandte Chemie. Volume 126:Number 18(2014)
• Page Start: 4726
• Page End: 4729
• Publication Date: 2014-03-25
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201311057
• Languages: English
• ISSNs: 0044-8249

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>A lanthanide half‐sandwich complex and a <italic>ansa</italic> lanthanidocene have been assessed for isoprene–styrene chain shuttling copolymerization with <italic>n</italic>‐butylethylmagnesium (BEM). In the presence of 1 equiv BEM, a fully amorphous multiblock microstructure of soft and hard segments is achieved. The microstructure consists of poly(isoprene‐<italic>co</italic>‐styrene) blocks, with hard blocks rich in styrene and soft blocks rich in isoprene. The composition of the blocks and the resulting glass transition temperatures (<italic>T</italic>_g) can be easily modified by changing the feed and/or the relative amount of the catalysts, highlighting a new class of thermoplastic elastomers (TPEs) with tunable transition temperatures. The materials self‐organize into nanostructures in the solid state.</p> </abstract>