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dc.contributor.authorAntunes, Marcelo de Sousa Pais
dc.contributor.authorRedondo Realinho, Vera Cristina de
dc.contributor.authorVelasco Perero, José Ignacio
dc.contributor.authorSolórzano Quijano, Eusebio
dc.contributor.authorRodríguez-Pérez, Miguel Ángel
dc.contributor.authorSaja, José Antonio de
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica
dc.date.accessioned2012-10-25T14:59:25Z
dc.date.created2012-09
dc.date.issued2012-09
dc.identifier.citationDe Sousa Pais, M. [et al.]. Thermal conductivity anisotropy in polypropylene foams prepared by supercritical CO2 dissolution. "Materials chemistry and physics", Setembre 2012, vol. 136, núm. 1, p. 268-276.
dc.identifier.issn0254-0584
dc.identifier.urihttp://hdl.handle.net/2117/16800
dc.description.abstractDifferent relative density polypropylene foams were prepared by means of two foaming processes: chemical foaming by compression moulding and physical foaming by high pressure CO2 dissolution. By controlling the foaming parameters, such as blowing agent concentration, foaming temperature, pressure drop and pressure drop rate, it was possible to regulate the cellular structure, foams showing from markedly isotropic-like cellular structures to ones with highly-elongated cells in the vertical foam growth direction (honeycomb-like cell orientation). The thermal conductivity was measured using the transient plane source method. Using this technique, it was possible to measure the global conductivity and the thermal conductivity in both the axial and radial directions of a given sample. Results show that the global thermal conductivity of foams was mainly regulated by their relative density. In addition, the honeycomb-like cell orientation of the CO2 dissolution foams resulted in considerably higher values in axial direction when compared to radial, demonstrating that there was a direct influence of cellular structure on the thermal conduction behaviour of these foams, enabling the development of new polypropylene foams with direction-dependent thermal properties.
dc.format.extent9 p.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Enginyeria dels materials::Materials plàstics i polímers
dc.subject.lcshPolypropylene - Thermal properties
dc.subject.lcshPlastic foams
dc.titleThermal conductivity anisotropy in polypropylene foams prepared by supercritical CO2 dissolution
dc.typeArticle
dc.subject.lemacEscumes (Indústria química)
dc.subject.lemacPolipropilè -- Propietats tèrmiques
dc.contributor.groupUniversitat Politècnica de Catalunya. POLYCOM - Polimers i compòsits: tecnologia
dc.identifier.doi10.1016/j.matchemphys.2012.07.001
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/S0254058412006268
dc.rights.accessRestricted access - publisher's policy
local.identifier.drac10804320
dc.description.versionPostprint (published version)
dc.date.lift10000-01-01
local.citation.authorDe Sousa Pais, M.; De Redondo, V.; Velasco J.I.; Solórzano, E.; Rodríguez-Pérez, M.; Saja, J. A. de
local.citation.publicationNameMaterials chemistry and physics
local.citation.volume136
local.citation.number1
local.citation.startingPage268
local.citation.endingPage276


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