title: Isohexide and Sorbitol-Derived, Enzymatically Synthesized Renewable Polyesters with Enhanced Tg.
abstract: Sugar-based polyesters derived from sorbitol and isohexides were obtained via solvent-free enzymatic catalysis. Pendant hydroxyl groups, coming from the sorbitol units, were present along the polyester backbone, whereas the two isohexides, namely, isomannide and isoidide dimethyl ester monomers, were selected to introduce rigidity into the polyester chains. The feasibility of incorporating isomannide as a diol compared to the isoidide dimethyl ester as acyl-donor via lipase-catalyzed polycondensation was investigated. The presence of bicyclic units resulted in enhanced Tgwith respect to the parent sorbitol-containing polyester lacking isohexides. The different capability of the two isohexides to boost the thermal properties confirmed the more flexible character provided by the isoidide diester derivative. Solvent-borne coatings were prepared by cross-linking the sugar-based polyester polyols with polyisocyanates. The increased rigidity of the obtained sugar-based polyester polyols led to an enhancement in hardness of the resulting coatings.
authors.affiliation: Laboratory of Physical Chemistry, Eindhoven University of Technology , P.O. Box 513, 5600 MB Eindhoven, The Netherlands.|Dutch Polymer Institute, P.O. Box 902, 5600 AX Eindhoven, The Netherlands.
authors.forename: Liliana
authors.initials: L
authors.lastname: Gustini
authors.affiliation: Laboratory of Physical Chemistry, Eindhoven University of Technology , P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
authors.forename: Cristina
authors.initials: C
authors.lastname: Lavilla
authors.affiliation: Departament d'Enginyeria Química, Universitat Politècnica de Catalunya, ETSEIB , Diagonal 647, 08028 Barcelona, Spain.
authors.forename: Antxon Martínez
authors.initials: AM
authors.lastname: de Ilarduya
authors.affiliation: Departament d'Enginyeria Química, Universitat Politècnica de Catalunya, ETSEIB , Diagonal 647, 08028 Barcelona, Spain.
authors.forename: Sebastián
authors.initials: S
authors.lastname: Muñoz-Guerra
authors.affiliation: Laboratory of Physical Chemistry, Eindhoven University of Technology , P.O. Box 513, 5600 MB Eindhoven, The Netherlands.|DSM Coating Resins, Ceintuurbaan 5, Zwolle, The Netherlands.
authors.forename: Cor E
authors.initials: CE
authors.lastname: Koning
mesh_terms: D002384:Catalysis; D004952:Esters / Q000737:chemistry; D008049:Lipase / Q000737:chemistry*; D011091:Polyesters / Q000138:chemical synthesis* / Q000737:chemistry; D011108:Polymers / Q000737:chemistry; D011140:Polyurethanes / Q000737:chemistry; D013012:Sorbitol / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: D004952:Esters; D011091:Polyesters; D011108:Polymers; D011140:Polyurethanes; C024617:polyol; D013012:Sorbitol; D008049:Lipase