Blocky poly(epsilon-caprolactone-co-butylene 2,5-furandicarboxylate) copolyesters via enzymatic ring opening polymerization
| Autor: | Juan Carlos Morales-Huerta, Antxon Martínez de Ilarduya, Sebastián Muñoz-Guerra |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Química, Universitat Politècnica de Catalunya. POL - Polímers Industrials Avançats i Biopolímers Tecnològics |
| Předmět: |
Polymers and Plastics
ring-opening polymerization Polyesters Polimerització caprolactone copolyesters enzymatic polymerization 02 engineering and technology 010402 general chemistry 01 natural sciences Ring-opening polymerization Catalysis Polymerization chemistry.chemical_compound Crystallinity Hydrolysis Enginyeria química [Àrees temàtiques de la UPC] Polymer chemistry Materials Chemistry FDCA Thermal stability Furan-based polyesters 2 5-Furandicarboxylic acid chemistry.chemical_classification Poliester Organic Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Copolímers Enzyme chemistry poly(butylene furanoate) copolyesters aliphatic-aromatic copolyesters Poly ɛ caprolactone 0210 nano-technology |
| Zdroj: | Recercat. Dipósit de la Recerca de Catalunya instname UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| Popis: | Cyclic oligo(butylene 2,5-furandicarboxylate) and e-caprolactone were copolymerized in bulk at 130-150 ºC by enzymatic ring opening polymerization using CALB as catalyst. Copolyesters within a wide range of compositions were thus synthesized with weight-average molecular weights between 20,000 and 50,000, the highest values being obtained for equimolar or nearly equimolar contents in the two components. The copolyesters consisted of a blocky distribution of the e-oxycaproate (CL) and butylene furanoate (BF) units that could be further randomized by heating treatment. The thermal stability of these copolyesters was comparable to those of the parent homopolyesters (PBF and PCL), and they all showed crystallinity in more or less degree depending on composition. Their melting and glass-transition temperatures were ranging between those of PBF and PCL with values increasing almost linearly with the content in BF units. The ability of these copolyesters for crystallizing from the melt was evaluated by comparative isothermal crystallization and found to be favored by the presence of flexible e-oxycaproate blocks. These copolyesters are essentially insensitive to hydrolysis in neutral aqueous medium but they became noticeably |
| Databáze: | OpenAIRE |
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