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Título : Microcellular polymeric foams based on 1‐vinyl‐2‐pyrrolidone and butyl‐acrylate with tuned thermal conductivity
Autor : Reglero Ruiz, José A.
Vallejos Calzada, Saúl
Sanjuán Cortázar, Ana María
García García, Félix Clemente
Múgica, Mikel .
Rodríguez Pérez, Miguel Ángel .
García Pérez, José Miguel
Publicado en: Journal of Applied Polymer Science. 2018, V. 135, n. 7, art. 45872
Editorial : Wiley
Fecha de publicación : feb-2018
Fecha de disponibilidad: mar-2019
ISSN : 0021-8995
DOI: doi.org/10.1002/app.45872
Resumen : Microcellular polymers have been produced by ScCO2 foaming, based on 1-vinyl-2-pyrrolidone (VP) and butyl-acrylate (BA). Three different copolymers were prepared, varying the compositions of VP and BA, following a simple radical polymerization process using an UV initiator. The samples a good foaming behavior and also excellent flexibility and handle ability, with expansion ratios between 1.53 and 1.72, and cell sizes in the microcellular range (below 5 mm). However, it was observed that the gas distribution and, consequently, the cellular structure inside the polymer foams was highly dependent on the VP and BA proportions, leading to very different thermal conductivity values, even for similar volume gas fraction values. These results were related to the copolymer nanostructuration, which seems to have an influence in the final pore structure, thus opening the possibility of designing microcellular foams with similar macroscopic characteristics but different thermal conductivity values
Palabras clave: foams
porous materials
radical polymerization
thermal properties
Materia: Química orgánica
Chemistry, Organic
URI : http://hdl.handle.net/10259/4928
Versión del editor: https://doi.org/10.1002/app.45872
Aparece en las colecciones: Artículos POLYMERS

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