Por favor, use este identificador para citar o enlazar este ítem:https://uvadoc.uva.es/handle/10324/51716
Título
Polystyrene/sepiolites nanocomposite foams: Relationship between composition, particle dispersion, extensional rheology, and cellular structure
Autor
Año del Documento
2021
Editorial
Elsevier
Descripción
Producción Científica
Documento Fuente
Materials Today Communications, 2021, vol. 29, 102850
Abstract
The main objective of this work is to analyze how the cellular structure of foamed polystyrene based (PS) nanocomposites, produced by gas dissolution foaming, is affected by the extensional rheological behavior of the polymer matrix and by the dispersion degree of the particles. These composites have been produced with different types of natural and organomodified sepiolites and with different contents of these particles. The extensional behavior and the dispersion degree were characterized by extensional and shear dynamic rheology, respectively. The results obtained indicate that the extensional rheological behavior controls the foam degeneration mechanisms; meanwhile, the way in which the particles are dispersed in the PS matrix controls the nucleation mechanisms. Results also indicate that, in these systems, the characteristics of the cellular structure are mainly defined by the way in which nucleation occurs. Therefore, improving the dispersion degree is a key approach to reduce the cell size by 90%, with respect to the pure polymer.
Palabras Clave
Cellular nanocomposites
Nanocompuestos celulares
Extensional rheology
Reología extensional
Sepiolites
Sepiolita
ISSN
2352-4928
Revisión por pares
SI
Patrocinador
Junta de Castilla y León (project VA202P20)
Ministerio de Ciencia, Innovación y Universidades (project RTI2018-098749-B-I00)
Ministerio de Ciencia, Innovación y Universidades (project RTI2018-098749-B-I00)
Propietario de los Derechos
© 2021 The Authors
Idioma
eng
Tipo de versión
info:eu-repo/semantics/publishedVersion
Derechos
openAccess
Collections
Files in this item
![Attribution-NonCommercial-NoDerivatives 4.0 Internacional](/themes/Mirage2//images/creativecommons/cc-by-nc-nd.png)