Now showing items 21-40 of 47

    • Estudio del hormigón de cal con fibras de polipropileno 

      Lucas Esteban, Patricia de (Universitat Politècnica de Catalunya, 2017-07-10)
      Master thesis
      Restricted access - author's decision
      El presente trabajo tiene como objetivo combinar dos temas importantes para la creación de materiales compatibles con el patrimonio edificado que ahora necesita de rehabilitaciones y restauraciones. Por un lado, los graves ...
    • Fracture toughness of polypropylene-based particulate composites 

      Arencón Osuna, David; Velasco Perero, José Ignacio (Molecular Diversity Preservation International, 2009-11-30)
      Article
      Open Access
      The fracture behaviour of polymers is strongly affected by the addition of rigid particles. Several features of the particles have a decisive influence on the values of the fracture toughness: shape and size, chemical ...
    • 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
      Restricted access - publisher's policy
      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 ...
    • Impact properties and water uptake behavior of old newspaper recycled fibers-reinforced polypropylene composites 

      Hernández Díaz, David; Villar Ribera, Ricardo Alberto; Espinach, Francesc Xavier; Julian, Fernando; Hernández Abad, Vicente; Delgado Aguilar, Marc (Multidisciplinary Digital Publishing Institute (MDPI), 2020-02-28)
      Article
      Open Access
      Natural fiber-reinforced thermoplastic composites can be an alternative to mineral fiber-based composites, especially when economic and environment concerns are included under the material selection criteria. In recent ...
    • Influencia del grafeno com nanoaditivo en una matriz de polipropileno 

      Pérez Llanos, Germán Aníbal (Universitat Politècnica de Catalunya, 2014-09)
      Master thesis
      Restricted access - author's decision
      A partir de la posibilidad de disponer de grafeno puro, muchos centros de investigación han dedicado grandes esfuerzos a estudiar sus propiedades y desplegar el potencial que parece tener en diversos campos. Las propiedades ...
    • Low-temperature plasma treatments in the design of polypropylene surgical meshes for hernia repair 

      Labay, Cédric Pierre; Canal Barnils, Cristina; Navarro Sentanyes, Antonio; Canal Arias, José María (2016)
      Conference report
      Restricted access - publisher's policy
      One of the new trends in textile biomaterials research is to deliver active compounds locally in the surgical site from the medical device. One way to manage post-operatory infections associated with mesh implants in ...
    • Materiales compuestos en base de PP y HDPE reforzados con fibras de cartón reciclado. Comportamiento mecánico 

      Nikonenko, Ruslan (Universitat Politècnica de Catalunya, 2012-09)
      Master thesis
      Open Access
      Los residuos del cartón ondulado “flutting” constituyen una fuente muy importante de fibras que pueden dar lugar a aplicaciones industriales. Las fibras lignocelulósicas pueden ser aprovechadas, dadas sus características, ...
    • Microcellular injection moulding: a comparison between MuCell process and the novel micro-foaming technology IQ Foam 

      Gomez-Monterde, J.; Hain, J; Sánchez Soto, Miguel; Maspoch Rulduà, M. Lluïsa (2019-01-24)
      Article
      Open Access
      The present work aims to compare two different injection moulding foaming technologies, the already known MuCell® process and the new emerged technology IQ Foam®, as well as the cell structure and mechanical behavior of ...
    • Microestructura y propiedades mecánicas de compuestos de polipropileno con hidróxido de magnesio y aluminio moldeados por inyección 

      Morhain, Cédric (Universitat Politècnica de Catalunya, 2001-07-03)
      Doctoral thesis
      Open Access
      Los hidróxidos de magnesio y de aluminio son unas cargas minerales cuyo uso como carga ignifugante para materiales plásticos, y en particular para polipropileno, es relativamente reciente, aunque en pleno crecimiento debido ...
    • Moulded polypropylene foams produced using chemical or physical blowing agents: structure–properties relationship 

      Saiz-Arroyo, Cristina; Saja, José Antonio de; Velasco Perero, José Ignacio; Rodríguez-Pérez, Miguel Ángel (2012)
      Article
      Restricted access - publisher's policy
      Polypropylene (PP) foams have become essential items due to their excellent properties. Nevertheless, obtaining net-shaped PP foams with medium relative densities is a complicated issue. In this article, two processes ...
    • New PHB-producing Bacillus Strain from Environmental Samples 

      Rodríguez Contreras, Alejandra María; Marqués Calvo, M. Soledad (Nova Science Publishers, Inc, 2015-12-16)
      Part of book or chapter of book
      Restricted access - publisher's policy
      Many microorganisms are known to synthesize poly[(R)-3-hydroxybutyrate] (PHB) from renewable resources. This biocompatible and biodegradable biopolyester possesses similar properties to some of the conventional plastics ...
    • Optimización del sistema de refrigeración de un molde de inyección para un envase de 17 litros 

      Gómez González, Sergio (Universitat Politècnica de Catalunya, 2010-03)
      Master thesis (pre-Bologna period)
      Open Access
      El objeto del presente proyecto es incrementar la productividad de un molde de inyección de un envase troncocónico de 17 litros de polipropileno mediante el rediseño y la optimización del sistema de refrigeración empleando ...
    • Oxygen plasma treated thermoplastics as integrated electroresponsive sensors 

      Fontana Escartín, Adrián; Lanzalaco, Sonia; Zhilev, Georgi; Armelín Diggroc, Elaine Aparecida; Bertran Cànovas, Òscar; Alemán Llansó, Carlos (Elsevier, 2024-03-01)
      Article
      Restricted access - publisher's policy
      Polypropylene (PP), thermoplastic polyurethane (TPU), polyethylene terephthalate glycol (PETG) and polylactic acid (PLA) 3D printed specimens, which are intrinsically non-electroresponsive materials, have been converted ...
    • Photochemical nanomodification of polymer surfaces: aerospace applications 

      Ferreté Aymerich, Eduard (Universitat Politècnica de Catalunya, 2010-09-28)
      Master thesis
      Open Access
      Engineering operations in space require the optimization of a wide variety of procedures and the design of new, lighter and more durable materials. One of the main concerns of human-operated space activities is exposure ...
    • Polypropylene-based porous membranes: influence of polymer composition, extrusion draw ratio and uniaxial strain 

      Castejón Galán, María del Pilar; Habibi, Kian; Saffar, Amir; Ajji, Abdellah; Martínez Benasat, Antonio; Arencón Osuna, David (2017-12-29)
      Article
      Open Access
      Several commercial grades of homo-polymer and its blends were selected to prepare microporous membranes through melt extrusion-annealing-uniaxial stretching technique (MEAUS). Branched or very fluid polypropylene was ...
    • 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
      Restricted access - publisher's policy
      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 ...
    • 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 multifuncionales a base de nanocompuestos de poliolefinas 

      Sousa Pais Antunes, Marcelo de (Universitat Politècnica de Catalunya, 2010-07-23)
      Doctoral thesis
      Open Access
      En esta tesis doctoral se presenta la preparación y caracterización de espumas rígidas multifuncionales obtenidas a partir de compuestos y nanocompuestos en base polietileno (PE) y polipropileno (PP), indagando en la ...
    • Preparation and characterization of cellulosic fibre-reinforced polypropylene foams 

      Ardanuy Raso, Mònica; Antunes, Marcelo de Sousa Pais; Velasco Perero, José Ignacio (Trans Tech Publications, 2010)
      Article
      Restricted access - publisher's policy
      The preparation and characterization of cellulosic fibre-reinforced polypropylene composite foams is presented. The cellulose fibres were isolated from a barley straw obtained from local sources. They were compounded with ...
    • Properties and optimal manufacturing conditions of chicken feathers thermoplastics biocomposites 

      Colom Fajula, Xavier; Rahalli, Ahmmed; Cañavate Ávila, Francisco Javier; Carrillo Navarrete, Fernando (2015-01-17)
      Article
      Open Access
      The aim of this study was the analysis and characterization of composites based on thermoplastics (ethylene vinyl acetate, polypropilene and high-density polyethylene) and chicken feathers. Several composite samples with ...