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Synthesis and Properties of Isosorbide-based Eco-friendly Plasticizers for Poly(vinyl chloride)


 In this study, eco-friendly and effective plasticizers, based on isosorbide, were synthesized and characterized. The esterification of isosorbide was conducted using different alkyl chain lengths of various fatty acids. The optimal esterification degree of isosorbide was obtained with a fatty acid of short alkyl chain length, after reaction with Ti(OBu)4 catalyst, at 220°C, after 6 h. An esterified isosorbide, with long alkyl chain length, was epoxidized to further enhance its plasticizing properties and enable low-cost production. The high epoxidation degree (91%) indicated efficient epoxidation by formic acid and hydrogen peroxide. Finally, the mechanical, thermal, and plasticizing properties of the prepared isosorbide-based plasticizers were compared to a commercial plasticizer. The plasticizers prepared in this study, particularly isosorbide di epoxidized oleate, could be used as eco-friendly and effective plasticizers for practical PVC applications.