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Therefore, there is a need to seek novel, renewable chemicals from biomass feedstocks that have comparable properties to petrochemicals. In this study, synthesis, thermal and mechanical properties, and degradability studies of a novel series of sustainable thiophene-based copolyesters like poly(hexylene 2,5-thiophenedicarboxylate-co-bis(2-hydroxyethoxybenzene) (PTBxHy) were conducted via a controlled melt polymerization method. Fourier-transform infrared (FTIR) and nuclear magnetic resonance (1H NMR) spectroscopy techniques elucidated the degree of randomness and structural properties of copolyesters. Meanwhile, gel permeation chromatography (GPC) analysis showed a high average molecular weight in the range of 67.4\u201378.7 \u00d7 103 g\/mol. The glass transition temperature (Tg) was between 69.4 and 105.5 \u00b0C, and the melting point between 173.7 and 194.2 \u00b0C. The synthesized polymers outperformed poly(ethylene 2,5-thiophenedicarboxylate) (PETF) and behaved similarly to polyethylene terephthalate. The copolyesters exhibited a high tensile strength of 46.4\u201370.5 MPa and a toughness of more than 600%, superior to their corresponding homopolyesters. The copolyesters, which ranged from 1,4-bis(2-hydroxyethyl)benzene thiophenedicarboxylate (TBB)-enriched to hexylene thiophenedicarboxylate (THH)-enriched, offered significant control over crystallinity, thermal and mechanical properties. Enzymatic hydrolysis of synthetized polymers using porcine pancreatic lipase (PP-L) over a short period resulted in significant weight losses of 9.6, 11.4, 30.2, and 35 wt%, as observed by scanning electron microscopy (SEM), with perforations visible on all surfaces of the films. Thus, thiophene-based polyesters with cyclic aromatic structures similar to terephthalic acid (TPA) show great promise as PET mimics. At the same time, PP-L appears to be a promising biocatalyst for the degradation of bioplastic waste and its recycling via re-synthesis processes.<\/jats:p>","DOI":"10.3390\/molecules28041825","type":"journal-article","created":{"date-parts":[[2023,2,15]],"date-time":"2023-02-15T05:12:26Z","timestamp":1676437946000},"page":"1825","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Synthesis by Melt-Polymerization of a Novel Series of Bio-Based and Biodegradable Thiophene-Containing Copolyesters with Promising Gas Barrier and High Thermomechanical Properties"],"prefix":"10.3390","volume":"28","author":[{"given":"Lesly Dasilva Wandji","family":"Djouonkep","sequence":"first","affiliation":[{"name":"Department of Petroleum Engineering, Applied Chemistry in Oil and Gas Fields, Yangtze University, Wuhan 430100, China"},{"name":"Lost Circulation Control Laboratory, National Engineering Laboratory for Petroleum Drilling Engineering, Yangtze University, Wuhan 430100, China"},{"name":"Key Laboratory of Drilling and Production Engineering for Oil and Gas, Wuhan 430100, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christian Tatchum","family":"Tamo","sequence":"additional","affiliation":[{"name":"National Advanced School of Engineering, University of Maroua, Maroua P.O. Box 46, Cameroon"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Belle Elda","family":"Simo","sequence":"additional","affiliation":[{"name":"Department of Earth Sciences, University of Dschang, Dschang P.O. Box 96, Cameroon"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nasiru","family":"Issah","sequence":"additional","affiliation":[{"name":"Department of Biochemistry, Kwame Nkrumah University, Kabwe P.O. Box 80404, Ghana"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marc Nivic","family":"Tchouagtie","sequence":"additional","affiliation":[{"name":"Department of Geography, University of Douala, Douala P.O. Box 2701, Cameroon"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Naomie Beolle Songwe","family":"Selabi","sequence":"additional","affiliation":[{"name":"Institute of Advanced Materials and Nanotechnology, Wuhan University of Science and Technology, Wuhan 430081, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ingo","family":"Doench","sequence":"additional","affiliation":[{"name":"Laboratory for Bioinspired Materials, Institute of Microsystems Engineering\u2014IMTEK, University of Freiburg, 79110 Freiburg, Germany"},{"name":"Freiburg Center for Interactive Materials and Bioinspired Technologies\u2014FIT, University of Freiburg, 79110 Freiburg, Germany"},{"name":"Freiburg Materials Research Center\u2014FMF, University of Freiburg, 79104 Freiburg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8220-8619","authenticated-orcid":false,"given":"Arnaud","family":"Kamdem Tamo","sequence":"additional","affiliation":[{"name":"Laboratory for Bioinspired Materials, Institute of Microsystems Engineering\u2014IMTEK, University of Freiburg, 79110 Freiburg, Germany"},{"name":"Freiburg Center for Interactive Materials and Bioinspired Technologies\u2014FIT, University of Freiburg, 79110 Freiburg, Germany"},{"name":"Freiburg Materials Research Center\u2014FMF, University of Freiburg, 79104 Freiburg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8190-5391","authenticated-orcid":false,"given":"Binqiang","family":"Xie","sequence":"additional","affiliation":[{"name":"Department of Petroleum Engineering, Applied Chemistry in Oil and Gas Fields, Yangtze University, Wuhan 430100, China"},{"name":"Lost Circulation Control Laboratory, National Engineering Laboratory for Petroleum Drilling Engineering, Yangtze University, Wuhan 430100, China"},{"name":"Key Laboratory of Drilling and Production Engineering for Oil and Gas, Wuhan 430100, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1312-622X","authenticated-orcid":false,"given":"Anayancy","family":"Osorio-Madrazo","sequence":"additional","affiliation":[{"name":"Laboratory for Bioinspired Materials, Institute of Microsystems Engineering\u2014IMTEK, University of Freiburg, 79110 Freiburg, Germany"},{"name":"Freiburg Center for Interactive Materials and Bioinspired Technologies\u2014FIT, University of Freiburg, 79110 Freiburg, Germany"},{"name":"Freiburg Materials Research Center\u2014FMF, University of Freiburg, 79104 Freiburg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,2,15]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"117","DOI":"10.1038\/s41578-021-00407-8","article-title":"Bioplastics for a circular economy","volume":"7","author":"Rosenboom","year":"2022","journal-title":"Nat. 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