Synthesis of aromatic–aliphatic polyesters by enzymatic ring opening polymerization of cyclic oligoesters and their cyclodepolymerization for a circular economy

Cyclic oligomers of hexamethylene furanoate and hexamethylene terephthalate were obtained from 1,6-hexanediol and the corresponding methyl esters using Candida antarctica lipase B (CALB) enzyme catalyst. HPLC, MALDI-TOF MS, and NMR analyses showed that mixtures composed from cyclic dimer up to hepta...

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Bibliographic Details
Published in:ACS Applied Polymer Materials
Main Authors: Flores, Irma, Martínez de Ilarduya Sáez de Asteasu, Domingo Antxon, Sardon, Haritz, Müller, Alejandro, Muñoz Guerra, Sebastián
Other Authors: Universitat Politècnica de Catalunya. Departament d'Enginyeria Química, Universitat Politècnica de Catalunya. POL - Polímers Industrials Avançats i Biopolímers Tecnològics
Format: Article in Journal/Newspaper
Language:English
Published: American Chemical Society (ACS) 2019
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Online Access:http://hdl.handle.net/2117/130296
https://doi.org/10.1021/acsapm.8b00265
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Summary:Cyclic oligomers of hexamethylene furanoate and hexamethylene terephthalate were obtained from 1,6-hexanediol and the corresponding methyl esters using Candida antarctica lipase B (CALB) enzyme catalyst. HPLC, MALDI-TOF MS, and NMR analyses showed that mixtures composed from cyclic dimer up to heptamer were obtained almost quantitatively. Subsequently, these cycles were polymerized by ring opening polymerization (ROP) mediated by CALB to obtain semicrystalline polymers. In addition, we demonstrated that the polymers obtained from the ROP process could be transformed into cyclic oligomers in high yields using enzymatic cyclodepolymerization, thereby recycling the polymer in a circular biosynthetic path. Postprint (author's final draft)