Development and characterization of fully renewable and biodegradable polyhydroxyalkanoate blends with improved thermoformability
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Título
Development and characterization of fully renewable and biodegradable polyhydroxyalkanoate blends with improved thermoformabilityAutoría
Fecha de publicación
2022-06-21Editor
MDPIISSN
2073-4360Cita bibliográfica
Feijoo, Patricia, Kerly Samaniego-Aguilar, Estefanía Sánchez-Safont, Sergio Torres-Giner, Jose M. Lagaron, Jose Gamez-Perez, and Luis Cabedo. 2022. "Development and Characterization of Fully Renewable and Biodegradable Polyhydroxyalkanoate Blends with Improved Thermoformability" Polymers 14, no. 13: 2527Tipo de documento
info:eu-repo/semantics/articleVersión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Poly(3-hydroxybutyrate-co-3-valerate) (PHBV), being one of the most studied and commercially available polyhydroxyalkanoates (PHAs), presents an intrinsic brittleness and narrow processing window that currently hinders ... [+]
Poly(3-hydroxybutyrate-co-3-valerate) (PHBV), being one of the most studied and commercially available polyhydroxyalkanoates (PHAs), presents an intrinsic brittleness and narrow processing window that currently hinders its use in several plastic applications. The aim of this study was to develop a biodegradable PHA-based blend by combining PHBV with poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBH), another copolyester of the PHA family that shows a more ductile behavior. Blends of PHBV with 20% wt., 30% wt., and 40% wt. of PHBH were obtained by melt mixing, processed by cast extrusion in the form of films, and characterized in terms of their morphology, crystallization behavior, thermal stability, mechanical properties, and thermoformability. Full miscibility of both biopolymers was observed in the amorphous phase due to the presence of a single delta peak, ranging from 4.5 °C to 13.7 °C. Moreover, the incorporation of PHBH hindered the crystallization process of PHBV by decreasing the spherulite growth rate from 1.0 µm/min to 0.3 µm/min. However, for the entire composition range studied, the high brittleness of the resulting materials remained since the presence of PHBH did not prevent the PHBV crystalline phase from governing the mechanical behavior of the blend. Interestingly, the addition of PHBH greatly improved the thermoformability by widening the processing window of PHBV by 7 s, as a result of the increase in the melt strength of the blends even for the lowest PHBH content. [-]
Publicado en
Polymers, Volume 14: Issue 13 (2022)Entidad financiadora
Ministerio de Ciencia e Innovación (Spain) | FEDER | Generalitat Valenciana | Universitat Jaume I
Código del proyecto o subvención
MCIN/AEI/10.13039/501100011033 | RTI2018-097249-B-C21 | AICO/2021/045 | UJI- B2019-44
Título del proyecto o subvención
Una manera de hacer Europa
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info:eu-repo/semantics/openAccess
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