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Polyurethane based on PLA and PCL incorporated with catechin: Structural, thermal and mechanical characterization

AutorArrieta, M. P.; Peponi, Laura
Palabras claveAntioxidant
Fecha de publicación2017
CitaciónEuropean Polymer Journal 89: 174-184 (2017)
ResumenCatechin (Cat) was added into polyurethane (PU) based on a tri-block copolymer of poly(L-lactic acid) and poly(ε-caprolactone) (PLLA-b-PCL-b-PLLA) to improve the thermal stability of the final PU composite materials. The morphological, structural, mechanical and thermal properties of PU-Cat composites loaded with 1 wt%, 3 wt% and 5 wt% of Cat were investigated and designed as PU-Cat1, PU-Cat3 and PU-Cat5, respectively. Homogeneous films were obtained after the solvent casting process, but the higher amount of 5 wt% used in this work could not be successfully dispersed and produced some structural defects as were observed by scanning electron microscopy. Well dispersed Cat in PU-Cat1 and PU-Cat3 not only substantially improved the thermal stability due to the Cat antioxidant effect, but also allowed the crystallization of PCL and PLLA blocks in the final PU-Cat composites. Additionally, PU-Cat composite materials showed excellent stretchability for film production.
Versión del editorhttp://dx.doi.org/10.1016/j.eurpolymj.2017.02.028
Identificadoresdoi: 10.1016/j.eurpolymj.2017.02.028
issn: 0014-3057
e-issn: 1873-1945
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