Nanocellular CO2 foaming of PMMA assisted by block copolymer nanostructuration
PINTO SANZ, Javier
Univ Valladolid, Dept Condensed Matter Phys
Laboratoire de Chimie des Polymères Organiques [LCPO]
Univ Valladolid, Dept Condensed Matter Phys
Laboratoire de Chimie des Polymères Organiques [LCPO]
DUMON, Michel
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 1 LCPO : Polymerization Catalyses & Engineering
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Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 1 LCPO : Polymerization Catalyses & Engineering
PINTO SANZ, Javier
Univ Valladolid, Dept Condensed Matter Phys
Laboratoire de Chimie des Polymères Organiques [LCPO]
Univ Valladolid, Dept Condensed Matter Phys
Laboratoire de Chimie des Polymères Organiques [LCPO]
DUMON, Michel
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 1 LCPO : Polymerization Catalyses & Engineering
< Réduire
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 1 LCPO : Polymerization Catalyses & Engineering
Langue
en
Article de revue
Ce document a été publié dans
Chemical Engineering Journal. 2014, vol. 243, p. 428-435
Elsevier
Résumé en anglais
Polymer foams with closed cells in the range of 90-200 nm and relative densities between 0.4 and 0.6 have been produced by CO2 gas dissolution foaming from neat poly(methyl methacrylate) (PMMA) and blends of PMMA and a ...Lire la suite >
Polymer foams with closed cells in the range of 90-200 nm and relative densities between 0.4 and 0.6 have been produced by CO2 gas dissolution foaming from neat poly(methyl methacrylate) (PMMA) and blends of PMMA and a triblock copolymer [poly(methyl methacrylate)-block poly(butyl acrylate)-block poly(methyl methacrylate), MAM]. Foams produced from these PMMA/MAM blends present a clear heterogeneous nucleation mechanism showing a clear relationship between the nanostructuration of the solid blend precursors and the nucleation efficiency of block copolymers during the saturation-expansion process. This paper discusses the role of the nanostructuration pattern of PMMA/MAM blends on the cells nucleation mechanism, showing that nucleation takes place preferably on the MAM nanostructures due to a combination of their high CO2-philicity, surface tension and morphology.< Réduire
Mots clés en anglais
PRESSURES
MECHANISMS
NUCLEATION
Nanofoam
Block copolymer
Heterogeneous nucleation
SUPERCRITICAL CARBON-DIOXIDE
POLYMER-FILMS
TEMPERATURE
SOLUBILITY
NANOFOAMS
Origine
Importé de halUnités de recherche