Beschreibung:
<jats:title>Abstract</jats:title><jats:p>New catalytic systems are developed to increase the transesterification efficiency during the synthesis of poly(ethylene terephthalate<jats:italic>‐co‐</jats:italic>isosorbide terephthalate) with the aim of compensating for the lack of reactivity of the isosorbide and to reduce the coloration of the polymer. The combination of antimony oxide with a second metal (lithium‐, magnesium‐, or aluminium‐based compounds) is investigated, leading to the discovery of innovative antimony‐based bimetallic catalytic systems that exhibit a higher polymerization efficiency, even at high isosorbide contents (20%) and, in some cases, lower coloration. <jats:boxed-text content-type="graphic" position="anchor"><jats:graphic xmlns:xlink="http://www.w3.org/1999/xlink" mimetype="image/jpeg" position="anchor" specific-use="enlarged-web-image" xlink:href="graphic/mgra001.jpg"><jats:alt-text>magnified image</jats:alt-text></jats:graphic></jats:boxed-text>
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