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In the presence of 1\u2005equiv BEM, a fully amorphous multiblock microstructure of soft and hard segments is achieved. The microstructure consists of poly(isoprene\u2010<jats:italic>co<\/jats:italic>\u2010styrene) blocks, with hard blocks rich in styrene and soft blocks rich in isoprene. The composition of the blocks and the resulting glass transition temperatures (<jats:italic>T<\/jats:italic><jats:sub>g<\/jats:sub>) 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\u2010organize into nanostructures in the solid state.<\/jats:p>","DOI":"10.1002\/anie.201311057","type":"journal-article","created":{"date-parts":[[2014,3,25]],"date-time":"2014-03-25T13:15:56Z","timestamp":1395753356000},"page":"4638-4641","source":"Crossref","is-referenced-by-count":86,"title":["Isoprene\u2013Styrene Chain Shuttling Copolymerization Mediated by a Lanthanide Half\u2010Sandwich Complex and a Lanthanidocene: Straightforward Access to a New Type of Thermoplastic 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