Now showing items 21-40 of 44

  • Foaming behaviour, structure, and properties of polypropylene nanocomposite foams 

    Antunes, Marcelo de Sousa Pais; Redondo Realinho, Vera Cristina de; Velasco Perero, José Ignacio (Hindawi Publishing Corporation, 2010)
    Article
    Open Access
    This work presents the preparation and characterization of compression-moulded montmorillonite and carbon nanofibre-polypropylene foams. The influence of these nanofillers on the foaming behaviour was analyzed in terms of ...
  • Halogen-free flame retardant polyolefin foams 

    Redondo Realinho, Vera Cristina de; Antunes, Marcelo de Sousa Pais; Santana Pérez, Orlando Onofre; Velasco Perero, José Ignacio (2012)
    Conference report
    Restricted access - publisher's policy
    The present work deals with the preparation and characterizacion of an improved fire-resistant ethylene-acrylate foamed material containing calcium carbonate and a silicon elastomer. This grade, usually employed on the ...
  • Heat transfer in polypropylene-based foams produced using different foaming processes 

    Antunes, Marcelo de Sousa Pais; Velasco Perero, José Ignacio; Redondo Realinho, Vera Cristina de; Martínez Velasco, Antonio Benito; Rodríguez-Pérez, Miguel Ángel; Saja, José Antonio de (Wiley, 2009-10)
    Article
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    This paper presents the characterization of the cellular structure and thermal conduction behaviour of polypropylene foams produced using different foaming processes, with the aim of selecting the best possible PP foam ...
  • Heat Transfer of Mineral-Filled Polypropylene Foams 

    Antunes, Marcelo de Sousa Pais; Redondo Realinho, Vera Cristina de; Martínez Benasat, Antonio; Solórzano Quijano, Eusebio; Rodríguez-Pérez, Miguel Ángel; Velasco Perero, José Ignacio (Trans Tech Publications, 2010)
    Article
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    The thermal conductivity of unfilled polypropylene foams produced using different foaming processes has previously been demonstrated to be mainly affected by the foam’s bulk density [1]. The influence of adding inorganic ...
  • Improvement of the fire behaviour of PCM in building applications 

    Haurie Ibarra, Laia; Lacasta Palacio, Ana María; Fernández Llado, Javier; Redondo Realinho, Vera Cristina de; Velasco Perero, José Ignacio (2012)
    Conference report
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    Phase change materials (PCM) have been proved to be an effective tool to regulate indoor temperature fluctuations and reduce the energetic demand of buildings [1,2]. Paraffins are among the most common PCM used for thermal ...
  • Influence of chemical composition of Brazilian organoclays on the morphological, structural and thermal properties of PLA-organoclay nanocomposites 

    Lopes Alves, Jefferson; De Tarso Viera e Rosa, Paulo; Redondo Realinho, Vera Cristina de; Antunes, Marcelo de Sousa Pais; Velasco Perero, José Ignacio; Morales, Ana Rita (2019-07-17)
    Article
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    The effects of adding different Brazilian organoclays, containing di-(hydrogenated tallow) dimethyl ammonium chloride (HTA), trihexyl tetradecyl phosphonium chloride (TDP), di(alkyl ester) dimethyl ammonium chloride (EA) ...
  • Influence of chemical nature, expansion ratio and cellular morphology on the fracture behaviour of flexible polyolefin-based foams assessed by the Essential Work of Fracture (EWF) 

    Arencón Osuna, David; Antunes, Marcelo de Sousa Pais; Redondo Realinho, Vera Cristina de; Velasco Perero, José Ignacio (2015-05)
    Article
    Open Access
    Several commercial polyolefin-based flexible foams produced by extrusion foaming were characterized in terms of their cellular morphology and fracture behaviour using the concept of the Essential Work of Fracture (EWF), ...
  • Influencia de las nanocargas en las propiedades termomecánicas de espumas poliméricas 

    Antunes, Marcelo de Sousa Pais; Gedler, Gabriel; Redondo Realinho, Vera Cristina de; Velasco Perero, José Ignacio (2012)
    Conference lecture
    Open Access
    Se presenta la influencia de nanopartículas y nanofibras sobre las propiedades termomecánicas de espumas poliméricas. A una formulación base polipropileno especial para espumación se le incorporaron nanocargas (silicatos ...
  • Microcellular Foaming of Layered Double Hydroxide-Polymer Nanocomposites 

    Martínez Benasat, Antonio; Redondo Realinho, Vera Cristina de; Antunes, Marcelo de Sousa Pais; Maspoch Rulduà, Mª Lluïsa; Velasco Perero, José Ignacio (American Chemical Society (ACS), 2011)
    Article
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    Microcellular foams of polystyrene (PS), poly(styrene-co-acrylonitrile) (SAN), and poly(methyl methacrylate) (PMMA) having organically modified layered double hydroxides (LDH) were prepared using a high-pressure CO2 ...
  • Micro-raman analysis of the molecular orientation of flexible polyolefin foams 

    Antunes, Marcelo de Sousa Pais; Arencón Osuna, David; Redondo Realinho, Vera Cristina de; Velasco Perero, José Ignacio (2009)
    Conference lecture
    Open Access
  • Microstructure anisotropy in polyolefin flexible foams 

    Antunes, Marcelo de Sousa Pais; Arencón Osuna, David; Redondo Realinho, Vera Cristina de; Velasco Perero, José Ignacio (IOP Publishing Ltd., 2009-11)
    Article
    Open Access
    The use of polyolefin flexible foams with typical thicknesses between 1 and 3 mm produced by a physical foaming extrusion process is nowadays quite widespread in the packaging sector. Their high flexibility and closed-cell ...
  • Novel polycarbonate-graphene nanocomposite foams prepared by CO2 dissolution 

    Gedler, Gabriel; Antunes, Marcelo de Sousa Pais; Redondo Realinho, Vera Cristina de; Velasco Perero, José Ignacio (IOP PUBLISHING LTD., 2012)
    Article
    Open Access
    Polycarbonate foams reinforced with 0,5 wt% of graphene were obtained by firstly melt-mixing the polycarbonate and graphene in an internal mixer, compression-moulding the melt-compounded grinded material and lastly dissolving ...
  • Polypropylene/Clay Nanocomposites: Combined effects of clay treatment and compatibilizer polymers on the structure and properties 

    Velasco Perero, José Ignacio; Ardanuy Raso, Mònica; Redondo Realinho, Vera Cristina de; Antunes, Marcelo de Sousa Pais; Fernández Renna, Ana Inés; González-Peña, J.I.; Rodríguez-Pérez, Miguel Ángel; Saja, José Antonio de (Wiley, 2006)
    Article
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    Combined effects of clay treatment and compatibilizer polymers on the structure and properties of polypropylene/clay nanocomposites were studied. Dynamic mechanical analysis was used to analyze comparatively the dynamic ...
  • Polypropylene foams: production, structure and properties 

    Antunes, Marcelo de Sousa Pais; Velasco Perero, José Ignacio; Redondo Realinho, Vera Cristina de (Nova Science Publishers, 2011-11-01)
    Part of book or chapter of book
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    It is well known the relevance given to the study of heat transfer in polymer foams, as one of the main applications is as lightweight thermal insulating elements. Alongside some of the possible strategies for improving ...
  • Porous membranes based on polypropylene-ethylene copolymers. Influence of temperature on extrusion, annealing and uniaxial strain stages 

    Castejón Galán, María del Pilar; Arencón Osuna, David; Antunes, Marcelo; Redondo Realinho, Vera Cristina de; Velasco Perero, José Ignacio; Martínez Benasat, Antonio (Multidisciplinary Digital Publishing Institute (MDPI), 2018-08-02)
    Article
    Open Access
    In this study, block and random copolymers of polypropylene–ethylene are selected to prepare porous membranes through the melt extrusion-annealing-uniaxial stretching technique (MEAUS), at a constant draw ratio. In some ...
  • Preparación y caracterización de espumas microcelulares nanoreforzadas 

    Redondo Realinho, Vera Cristina de; Antunes, Marcelo de Sousa Pais; Santana Pérez, Orlando Onofre; Sánchez Soto, Miguel; Velasco Perero, José Ignacio (2010-06-23)
    Conference report
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    Las espumas microcelulares poseen óptimas propiedades específicas que pueden ser ampliadas por incorporación de nanopartículas laminares y/o sustratos inorgánicos. Por ello, en el presente estudio se han preparado, por el ...
  • Preparación y caracterización de espumas multifuncionales de polipropileno 

    Antunes, Marcelo de Sousa Pais; Redondo Realinho, Vera Cristina de; Martínez Benasat, Antonio; Maspoch Rulduà, Mª Lluïsa; Velasco Perero, José Ignacio (Universidad de Zaragoza, 2010-06-23)
    Conference report
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    La combinación de la espumación junto con refuerzos funcionales permite ampliar el rango de propiedades de los sólidos, añadiendo a una elevada rigidez específica la regulación de otras características como las propiedades ...
  • Study of the cellular structure heterogeneity and anisotropy of polypropylene and polypropylene nanocomposite foams 

    Antunes, Marcelo de Sousa Pais; Velasco Perero, José Ignacio; Redondo Realinho, Vera Cristina de; Solórzano Quijano, Eusebio (Society of Plastics Engineers, 2009)
    Article
    Restricted access - publisher's policy
    This article presents the analysis of the processing parameters influence on the foaming behavior and cellular structure of PP-montmorillonite foams. Polypropylene nanocomposites containing 5.0 phr of an organically- modified ...
  • Study of the influence of the pressure drop rate on the foaming behavior and dynamic-mechanical properties of CO2 dissolution microcellular polypropylene foams 

    Antunes, Marcelo de Sousa Pais; Redondo Realinho, Vera Cristina de; Velasco Perero, José Ignacio (2010)
    Article
    Restricted access - publisher's policy
    This article presents the preparation of microcellular polypropylene foams produced by a CO2 batch-foaming process and their characterization regarding the influence of the pressure drop rate on the foaming behavior and ...
  • The effects of combining nanoclay and steel wires multi-scalar reinforcements on the structure and properties of polyurethane foams 

    Cano, Álvaro; Antunes, Marcelo de Sousa Pais; Redondo Realinho, Vera Cristina de; Haurie Ibarra, Laia; Velasco Perero, José Ignacio (2011)
    Conference report
    Restricted access - publisher's policy
    In this paper we prepared and characterized several polyurethane composite foams by combining variable concentrations of organophilic clay (montmorillonite) and metal reinforcement, with the objective of developing novel ...