Effect of Chain Stereoconfiguration on Poly(3-hydroxybutyrate) Crystallization Kinetics
| Autor: | Caputo, Maria Rosaria, Tang, Xiaoyan, Westlie, Andrea H., Sardon, Haritz, Chen, Eugene Y.-X., Müller, Alejandro J. |
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| Přispěvatelé: | European Commission |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Biomacromolecules Addi. Archivo Digital para la Docencia y la Investigación instname |
| ISSN: | 1525-7797 |
| DOI: | 10.1021/acs.biomac.2c00682 |
| Popis: | Poly(3-hydroxybutyrate) (PHB) is naturally accumulated by bacteria but can also be synthesized chemically. Its processability is limited, as it tends to degrade at temperatures above its melting temperature; hence, investigation into crystallization kinetics and morphology of PHB materials of both natural and synthetic origins is of great need and interest to get a better understanding of structure-property relationship. Accordingly, this contribution reports a first study of the crystallization and morphology of synthetic PHB materials of different molecular weights. These synthetic PHBs are racemic mixtures (50/50 mol %) of R and S chain configurations and are compared with an enantiopure bacterial R-PHB. Nonisothermal and isothermal crystallization studies show that R and S chains of PHB can cocrystallize in the same unit cell as the R-PHB. Most significantly, the results show that the presence of S chains decreases the overall crystallization rate, which could enhance the processability and industrialization of PHB-based materials. The work performed at CSU was supported by the U.S. National Science Foundation (NSF-1955482) to E.Y.C. W e would like to acknowledge the financial support from the BIODEST project; this project has received funding from the European Union's Horizon 2020 Research and Innovation Programme under the Marie Sklodowska-Curie Grant Agreement No. 778092. We acknowledge funding from the Basque Government through Grant IT1503-22. We also thank the ALBA synchrotron for funding (Granted Proposal 2021085253) , facilities, and staff support. |
| Databáze: | OpenAIRE |
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