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Polymers 2017, 9(11), 590;

Bimetallic Catalytic Systems Based on Sb, Ge and Ti for the Synthesis of Poly(ethylene terephthalate-co-isosorbide terephthalate)

University Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181—UCCS—Unité de Catalyse et Chimie du Solide, F-59000 Lille, France
IFMAS, Institut Français des Matériaux Agro-Sourcés, 60 Avenue du Halley, F-59650 Villeneuve-d’Ascq, France
Roquette Frères, 62080 Lestrem CEDEX, France
Author to whom correspondence should be addressed.
Received: 10 October 2017 / Revised: 27 October 2017 / Accepted: 6 November 2017 / Published: 9 November 2017
(This article belongs to the Special Issue Biodegradable and Biobased Polyesters)
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The insertion of rigid monomers such as isosorbide into poly(ethylene terephthalate) (PET) allows for the access of polymers with improved properties, notably in terms of thermal stability. This biobased monomer is however poorly reactive, and harsh reaction conditions lead to color concerns regarding the resulting polymer. This has motivated the development of catalytic systems enabling an increase of the reaction rate and a good coloration. In this study, we have assessed bimetallic catalytic systems based on the main metals used for PET catalysis, i.e., antimony, germanium and titanium, for the synthesis of poly(ethylene terephthalate-co-isosorbide terephthalate) (PEIT). The Sb2O3/Ti(OiPr)4 combination leads to a high reaction rate while maintaining an acceptable coloration. On the other hand, combining Sb2O3 with GeO2 affords the formation of poly(ethylene terephthalate-co-isosorbide terephthalate) without coloration concerns and a reaction rate higher than that observed using the single metal catalysts. Molecular weights and microstructure including diethyleneglycol (DEG) and isosorbide contents are also discussed, together with the thermal properties of the resulting PEIT. The GeO2/Ti(OiPr)4 is also assessed, and leads to average performances. View Full-Text
Keywords: isosorbide; poly(ethylene terephthalate); catalysis isosorbide; poly(ethylene terephthalate); catalysis

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Stanley, N.; Chenal, T.; Delaunay, T.; Saint-Loup, R.; Jacquel, N.; Zinck, P. Bimetallic Catalytic Systems Based on Sb, Ge and Ti for the Synthesis of Poly(ethylene terephthalate-co-isosorbide terephthalate). Polymers 2017, 9, 590.

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