Isoprene–Styrene Chain Shuttling Copolymerization Mediated by a Lanthanide Half‐Sandwich Complex and a Lanthanidocene: Straightforward Access to a New Type of Thermoplastic Elastomers |
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| Authors: | Dr. Andreia Valente Dr. Gregory Stoclet Dr. Fanny Bonnet Prof. André Mortreux Prof. Marc Visseaux Prof. Philippe Zinck |
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| Affiliation: | 1. Unité de Catalyse et Chemie du Solide, CNRS, University Lille 1, Science and Technology, 59655 Villeneuve d'Ascq (France);2. Unité Matériaux Et Transformations, CNRS, University Lille 1, Science and Technology, 59655 Villeneuve d'Ascq (France) |
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| Abstract: | A lanthanide half‐sandwich complex and a ansa lanthanidocene have been assessed for isoprene–styrene chain shuttling copolymerization with n‐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‐co‐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 (Tg) 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. |
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| Keywords: | block copolymers chain shuttling coordinative chain transfer polymerization copolymerization lanthanides |
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