Exploració per autor "Velasco Perero, José Ignacio"
Ara es mostren els items 37-56 de 148
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Effects of graphene nanoplatelets on the morphology of polycarbonate-graphene composite foams prepared by supercritical carbon dioxide two-step foaming
Gedler, Gabriel; Antunes, Marcelo de Sousa Pais; Velasco Perero, José Ignacio (2015-05)
Article
Accés obertLow density polycarbonate foams containing different amounts of graphene nanoplatelets with variable cellular morphologies were prepared using a supercritical carbon dioxide two-step foaming process, which consisted of the ... -
Electrical conduction behavior of high-performance microcellular nanocomposites made of graphene nanoplatelet-filled polysulfone
Abbasi, Hooman; Antunes, Marcelo de Sousa Pais; Velasco Perero, José Ignacio (2020-12-04)
Article
Accés obertGraphene nanoplatelet (GnP)-filled polysulfone (PSU) cellular nanocomposites, prepared by two different methods—namely, water vapor-induced phase separation (WVIPS) and supercritical CO2 dissolution (scCO2) foaming—were ... -
Electromagnetic shielding effectiveness of polycarbonate/graphene nanocomposite foams processed in 2-steps with supercritical carbon dioxide
Gedler, Gabriel; Antunes, Marcelo de Sousa Pais; Velasco Perero, José Ignacio; Ozisik, Rahmi (2015)
Article
Accés obertThe electromagnetic interference (EMI) shielding properties of polycarbonate/graphene composites foamed with supercritical carbon dioxide were investigated as a function of cellular morphology and graphene particle dispersion. ... -
Enhanced electrical conductivity in graphene-filled polycarbonate nanocomposites by microcellular foaming with sc-CO2
Gedler, Gabriel; Antunes, Marcelo de Sousa Pais; Velasco Perero, José Ignacio (2016-01)
Article
Accés obertElectrically conductive polycarbonate (PC) foams containing a low concentration of graphene nanoplatelets (0.5 wt.%) were produced with variable range of expansion ratio by applying a high-pressure batch foaming process ... -
Enhanced electromagnetic interference shielding effectiveness of polycarbonate/graphene nanocomposites foamed via 1-step supercritical carbon dioxide process
Gedler, Gabriel; Antunes, Marcelo de Sousa Pais; Velasco Perero, José Ignacio; Ozisik, Rahmi (2016-01)
Article
Accés obertThe dielectric and electromagnetic interference (EMI) shielding properties of polycarbonate/graphene nanocomposites foamed using supercritical carbon dioxide were studied as a function of their cellular and compositemorphology. ... -
Enhanced fire behavior of Casico-based foams
Redondo Realinho, Vera Cristina de; Antunes, Marcelo de Sousa Pais; Velasco Perero, José Ignacio (2016-06)
Article
Accés obertThe present work deals with the preparation and characterization of improved fire-retardant ethylene-acrylate foams. A commercial formulation, usually employed in the cable industry sector, Casico, was modified using two ... -
Enhancing the electrical conductivity of polyetherimide-based foams by simultaneously increasing the porosity and graphene nanoplatelets dispersion
Abbasi, Hooman; Antunes, Marcelo de Sousa Pais; Velasco Perero, José Ignacio (2018-09-19)
Article
Accés obertSignificant improvement in electrical conductivity of graphene nanoplatelets-filled polyetherimide (PEI) foams was achieved by simultaneously increasing the porosity and graphene nanoplatelets dispersion. Foams were prepared ... -
Esparto wool as reinforcement in hybrid polyurethane composite foams
Antunes, Marcelo de Sousa Pais; Cano, Álvaro; Haurie Ibarra, Laia; Velasco Perero, José Ignacio (2011-11)
Article
Accés restringit per política de l'editorialIn the present work polyurethane foams containing variable concentrations of nano-sized clay and esparto wool were prepared and studied, with the objective of developing new multi-scalar rigid foams. The addition of ... -
Espumas ignífugas de poliolefina libres de halógenos
Redondo Realinho, Vera Cristina de; Antunes, Marcelo de Sousa Pais; Haurie Ibarra, Laia; Maspoch Rulduà, M. Lluïsa; Velasco Perero, José Ignacio (2012)
Text en actes de congrés
Accés obertEn el presente trabajo se han preparado y caracterizado espumas ignífugas de poliolefinas libres de halógenos. Se ha utilizado para ello una formulación comercial, empleada típicamente en la industria de cables, y se le ... -
Essential work of fracture (EWF): a useful tool for the fracture toughness characterization of particulate polyolefin composites
Arencón Osuna, David; Antunes, Marcelo de Sousa Pais; Velasco Perero, José Ignacio (Nova Science Publishers, 2011-01-03)
Capítol de llibre
Accés restringit per política de l'editorialThe characterization of the fracture toughness of polyolefin composites filled with inorganic particles is commonly solved by means of standardized testing procedures based wherther on the Linear Elastic Fracture Mechanics ... -
Extraction and characterization of starches from pigmented rice
da Silva Ramos, Luan; Piler de Carvalho, Carlos W.; Velasco Perero, José Ignacio; Matta Fakhouri, Farayde (2020-08-01)
Article
Accés obertThe aim of this work was to extract and characterize starch from three varieties of pigmented rice (named white, red and black), preserving the bioactive compounds. The extraction yield was 44.0%, 47.0% and 35.7%, respectively. ... -
Flame retardancy effect of combined ammonium polyphosphate and aluminium diethyl phosphinate in acrylonitrile-butadiene-styrene
Redondo Realinho, Vera Cristina de; Haurie Ibarra, Laia; Formosa, Joan; Velasco Perero, José Ignacio (2018-07-23)
Article
Accés obertThe present work investigates the fire retardancy mechanisms of ammonium polyphosphate (APP) and aluminium diethyl phosphinate salt (AlPi) in an acrylonitrile-butadiene-styrene copolymer (ABS) by analysing the pyrolysis, ... -
Foamed polypropylene for industrial applications
Antunes, Marcelo de Sousa Pais; Velasco Perero, José Ignacio (Nova Science Publishers, 2013)
Capítol de llibre
Accés restringit per política de l'editorialThere is a great deal of industrial interest in the development of increasingly lighter materials based on polymer foams with improved specific properties for the most varied purposes, from flexible foams for packaging to ... -
Foaming behavior, cellular structure and physical properties of polybenzoxazine foams
Ardanuy Raso, Mònica; Rodríguez-Pérez, Miguel Ángel; Saja, José Antonio de; Velasco Perero, José Ignacio (2012-04-10)
Article
Accés restringit per política de l'editorialIn this paper, polymer foams based on a benzoxazine resin have been successfully prepared using azodicarbonamide (ADC) as a chemical blowing agent and have been characterized regarding their foaming behavior, cellular ... -
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
Accés obertThis 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 ... -
Foaming of polypropylene by using both chemical and physical blowing agents. A comparative study of the structure and physical properties
Saiz-Arroyo, Cristina; Rodríguez-Pérez, Miguel Ángel; Antunes, Marcelo de Sousa Pais; Velasco Perero, José Ignacio; Saja, José Antonio de (2010)
Text en actes de congrés
Accés restringit per política de l'editorialMicrocellular foams have focused attention of researches due to improvement in some properties when compared to conventional foams. Several production routes for these materials have been developed although most of them ... -
FONAMENTS DE CIENCIA DELS MATERIALS (Examen 1r Quadr.)
Velasco Perero, José Ignacio (Universitat Politècnica de Catalunya, 2003-01-21)
Examen
Accés restringit a la comunitat UPC -
FONAMENTS DE CIENCIA DELS MATERIALS (Examen 1r Quadr.)
Velasco Perero, José Ignacio (Universitat Politècnica de Catalunya, 2002-11-05)
Examen
Accés restringit a la comunitat UPC -
FONAMENTS DE CIENCIA DELS MATERIALS (Examen 1r Quadr.)
Velasco Perero, José Ignacio (Universitat Politècnica de Catalunya, 2004-01-07)
Examen
Accés restringit a la comunitat UPC -
FONAMENTS DE CIENCIA DELS MATERIALS (Examen 2n Quadr.)
Velasco Perero, José Ignacio (Universitat Politècnica de Catalunya, 2004-04-19)
Examen
Accés restringit a la comunitat UPC