Journal
JOURNAL OF SUPERCRITICAL FLUIDS
Volume 140, Issue -, Pages 270-278Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.supflu.2018.07.011
Keywords
Microcellular polymer foam; Films; Cross-linking; Tensile properties; ScCO2 foaming
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Funding
- Fondo Europeo de Desarrollo Regional (FEDER)
- Spanish Agencia Estatal de Investigacion (AEI) [MAT2017-84501-R]
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A series of cross-linked copolymer films based on 1-vinyl-2-pyrrolidone and methyl methacrylate were produced using different poly(ethylene glycol) dimethacrylates as cross-linking agents. The average molecular mass of the cross-linking agent was varied, then allowing the foaming process using supercritical CO2 (ScCO2), obtaining microcellular films with different cellular structures as a function of the molecular mass of the cross-linking agent. The chemical structure, swelling behavior, CO2 uptake and cellular morphology of the materials were studied. Finally, the influence of the different cross-linking agents in the mechanical properties was also evaluated by measuring the tensile properties of the microcellular films.
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