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dc.contributor.authorErnzen, Juliano Robertopt_BR
dc.contributor.authorCovas, José Antonio Colaço Gomespt_BR
dc.contributor.authorFernandez, Angel Marcospt_BR
dc.contributor.authorFiorio, Rudineipt_BR
dc.contributor.authorBianchi, Otáviopt_BR
dc.date.accessioned2024-01-10T03:35:57Zpt_BR
dc.date.issued2023pt_BR
dc.identifier.issn2073-4360pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/270766pt_BR
dc.description.abstractThermoplastic polyurethanes (TPUs) are remarkably versatile polymers due to the wide range of raw materials available for their synthesis, resulting in physicochemical characteristics that can be tailored according to the specific requirements of their final applications. In this study, a renewable bio-based polyol obtained from soybean oil is used for the synthesis of TPU via reactive extrusion, and the influence of the bio-based polyol on the multi-phase structure and properties of the TPU is studied. As raw materials, 4,40 -diphenylmethane (MDI), 1,4-butanediol, a fossil-based polyester polyol, and a bio-based polyol are used. The fossil-based to soybean-based polyol ratios studied are 100/0, 99/1, 95/5, 90/10, 80/20, and 50/50% by weight, respectively. The TPUs were characterized by size exclusion chromatography (SEC), gel content analysis, Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), small-angle X-ray scattering (SAXS), dynamic mechanical analysis (DMA), and contact angle measurements. The results reveal that incorporating the renewable polyol enhances the compatibility between the rigid and flexible segments of the TPU. However, due to its high functionality, the addition of soybean-based polyol can promote cross-linking. This phenomenon reduces the density of hydrogen bonds within the material, also reducing polarity and restricting macromolecular mobility, as corroborated by higher glass transition temperature (Tg) values. Remarkably, the addition of small amounts of the bio-based polyol (up to 5 wt.% of the total polyol content) results in high-molecular-weight TPUs with lower polarity, combined with suitable processability and mechanical properties, thus broadening the range of applications and improving their sustainability.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofPolymers [recurso eletrônico]. Basel. Vol. 15, n. 19 (Oct 2023), [Article] 4010, p. 1-18pt_BR
dc.rightsOpen Accessen
dc.subjectThermoplastic polyurethaneen
dc.subjectPoliuretanospt_BR
dc.subjectSoybean polyolen
dc.subjectPolímeros termoplásticospt_BR
dc.subjectPolióispt_BR
dc.subjectReactive extrusionen
dc.subjectÓleo de sojapt_BR
dc.subjectStructure-properties relationshipen
dc.titleSoybean-based polyol as a substitute of fossil-based polyol on the synthesis of thermoplastic polyurethanes : the effect of its content on morphological and physicochemical propertiespt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001188876pt_BR
dc.type.originEstrangeiropt_BR


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