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    Por favor, use este identificador para citar o enlazar este ítem:http://uvadoc.uva.es/handle/10324/40704

    Título
    Influence of the viscosity of poly(methyl methacrylate) on the cellular structure of nanocellular materials
    Autor
    Bernardo García, VictoriaAutoridad UVA
    Laguna Gutiérrez, Ester
    Rodríguez Pérez, Miguel ÁngelAutoridad UVA Orcid
    Año del Documento
    2019
    Documento Fuente
    Polym Int 2020; 69: 72–83
    Zusammenfassung
    Three different grades of poly(methyl methacrylate) (PMMA) with different rheological properties are used for the production of nanocellular materials using gas dissolution foaming. The influences of both the viscosity of the different polymers and the processing parameters on the final cellular structure are studied using a wide range of saturation and foaming conditions. Foaming conditions affect similarly all cellular materials. It is found that an increase of the foaming temperature results in less dense nanocellular materials, with higher cell nucleation densities. In addition, it is demonstrated that a lower viscosity leads to cellular polymers with a lower relative density but larger cell sizes and smaller cell nucleation densities, these differences being more noticeable for the conditions in which low solubilities are reached. It is possible to produce nanocellular materials with relative densities of 0.24 combined with cell sizes of 75 nm and cell nucleation densities of 1015 nuclei cm−3 using the PMMA with the lowest viscosity. In contrast, minimum cell sizes of around 14 nm and maximum cell nucleation densities of 3.5 × 1016 nuclei cm−3 with relative densities of 0.4 are obtained with the most viscous one. © 2019 Society of Chemical Industry
    ISSN
    0959-8103
    Revisión por pares
    SI
    DOI
    10.1002/pi.5920
    Idioma
    spa
    URI
    http://uvadoc.uva.es/handle/10324/40704
    Tipo de versión
    info:eu-repo/semantics/draft
    Derechos
    openAccess
    Aparece en las colecciones
    • BioEcoUVa - Artículos de revista [196]
    • DEP32 - Artículos de revista [284]
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    Polym Int 2020 69 72, 83.pdf
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