Now showing items 1-20 of 23

  • Aplicación de la Mecánica de la Fractura Post-Cedencia a Polímeros 

    Maspoch Rulduà, Mª Lluïsa; Franco Urquiza, Edgar Adrian; Gamez Pérez, José; Sánchez Soto, Miguel; Velasco Perero, José Ignacio; Santana Pérez, Orlando Onofre; Martínez Benasat, Antonio (2010-07-30)
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    La técnica del trabajo esencial de fractura (EWF) se ha utilizado en la caracterización a fractura de materiales que desarrollan una amplia ductilidad y donde ocurre una completa cedencia antes del inicio de la propagación ...
  • Chain architecture modifications of Poly(Lactic Acid) by reactive extrusion 

    Santana Pérez, Orlando Onofre; Callioux, Jonathan; Franco Urquiza, Edgar Adrian; Bou Serra, Jordi; Carrasco Alonso, Félix Ángel; Gamez Pérez, José; Maspoch Rulduà, Mª Lluïsa (2011)
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  • Comportamiento a fractura de dos grados comerciales PLA: influencia de la estructura cristalina 

    Gamez Pérez, José; Velázquez Infante, Julio Cesar; Franco Urquiza, Edgar Adrian; Velasco Perero, José Ignacio; Maspoch Rulduà, Mª Lluïsa (2010)
    Conference report
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    En este trabajo se ha estudiado el efecto de un tratamiento de rejuvenecimiento aplicado a láminas obtenidas por extrusión-calandra a partir de dos grados comerciales de PLA, con diferentes purezas ópticas. Se han evaluado ...
  • Compuestos de PLA/o-MMT: caracterización morfológica y mecánica 

    Velázquez Infante, Julio Cesar; Franco Urquiza, Edgar Adrian; Santana Pérez, Orlando Onofre; Martínez Benasat, Antonio; Maspoch Rulduà, Mª Lluïsa; Gamez Pérez, José; Carrasco Alonso, Félix Ángel (2011)
    Conference report
    Open Access
    En este trabajo se investiga la influencia del procesado y del contenido de nanoarcilla en las propiedad mecánicas de láminas obtenidas por extrusión-calandra a partir de un grado comercial de PLA y una nanoarcilla ...
  • Effect of the recycling and annealing on the mechanical and fracture properties of poly(lactic acid) 

    Nascimento, L.; Gamez Pérez, José; Santana Pérez, Orlando Onofre; Velasco Perero, José Ignacio; Maspoch Rulduà, Mª Lluïsa; Franco Urquiza, Edgar Adrian (2010-12)
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    The aim of this work is to evaluate the use of Poly(lactic acid)(PLA) industrial waste as a source of raw material for certain applications, as well to understand the effects of the annealing on the fracture behaviour of ...
  • Effect of the strain rate and drawing temperature on the mechanical behavior of EVOH and EVOH composites 

    Franco Urquiza, Edgar Adrian; Gamez Pérez, José; Velázquez Infante, Julio Cesar; Santana Pérez, Orlando Onofre; Martínez Benasat, Antonio; Maspoch Rulduà, Mª Lluïsa (2012-02-27)
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    The effect of the strain rate and draw temperature on the mechanical behavior of ethylene vinyl alcohol (EVOH) and EVOH composites was analyzed. When EVOH is stretched at moderate strain rates, evidence of strain-induced ...
  • Effect of the unidirectional drawing on the thermal and mechanical properties of PLA films with different L -isomer content 

    Velázquez Infante, Julio Cesar; Gamez Pérez, José; Franco Urquiza, Edgar Adrian; Santana Pérez, Orlando Onofre; Carrasco, F; Maspoch Rulduà, Mª Lluïsa (2013-02-15)
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    This work simulates the thermoforming process of two different L-isomer content PLA grades (95.6 and 98%), studying the influence on the induced morphology and the variation in the thermal and tensile properties. The ...
  • Essential work of fracture analysis of the tearing of a ductile polymer film 

    Martínez Benasat, Antonio; Segovia, Angélica; Gamez Pérez, José; Maspoch Rulduà, Mª Lluïsa (2010-09)
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    The fracture behaviour of a 0.5 mm thick ethylene-propylene block copolymer, previously evaluated using the essential work of fracture method, has been analyzed again in more detail, using different plots, allowing the ...
  • Estudio de la estabilidad térmica en nanocompuestos POM/POSS 

    Illescas Fernandez, Silvia; Arostegui, Asier; Sánchez Soto, Miguel; Arencón Osuna, David; Gamez Pérez, José; Franco Urquiza, Edgar Adrian (Universidad de Zaragoza, 2010)
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    Debido a sus excelentes propiedades termo-mecánicas el polióxido de metileno (POM) es un polímero de gran interés industrial. Sin embargo, uno de sus mayores inconvenientes es su tendencia a la termooxidación que ocasiona ...
  • Films of native and modified starch reinforced with fiber: influence of some extrusion variabels using response surface methodology 

    Galicia Garcia, Tomás; Martínez Bustos, F; Jiménez Arévalo, Omar; Arencón Osuna, David; Gamez Pérez, José; Martínez Benasat, Antonio (2012-10-25)
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    Corn starch (native and phosphorylated) and potato films containing glycerol as plasticizer, and bagasse sugar cane as fiber, were produced by extrusion-calendering process, and characterized for the mechanical properties ...
  • Fractura postcedencia de polímeros 

    Maspoch Rulduà, Mª Lluïsa; Franco Urquiza, Edgar Adrian; Santana Pérez, Orlando Onofre; Gamez Pérez, José; Sánchez Soto, Miguel; Velasco Perero, José Ignacio; Martínez Benasat, Antonio (2011)
    Conference report
    Open Access
  • Fracture behavior of quenched poly(lactic acid) 

    Gamez Pérez, José; Velázquez Infante, Julio César; Franco Urquiza, Edgar Adrian; Pagès Figueras, Pere; Carrasco, F; Santana Pérez, Orlando Onofre; Maspoch Rulduà, Mª Lluïsa (2011-01)
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    The effect of a quenching treatment applied on heated cast sheet extruded films of two poly(lactic acid) (PLA) commercial grades, with different optical purities, was studied. The thermal and mechanical properties of the ...
  • Fracture behaviour of de-aged poly(lactic acid) assessed by essential work of fracture and J-Integral methods 

    Santana Pérez, Orlando Onofre; Rodríguez, C.; Belzunce, J.; Gamez Pérez, José; Carrasco Alonso, Félix Ángel; Maspoch Rulduà, Mª Lluïsa (2010-12)
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    The applicability of the essential work of fracture (EWF) in SENB geometry as an alternative to the J-integral methodology has been assessed. An amorphous poly(lactic acid) (PLA) with ductile behaviour promoted by a de-ageing ...
  • Fracture behaviour of poly[ethylene–(vinyl alcohol)]/organo-clay composites 

    Maspoch Rulduà, Mª Lluïsa; Franco Urquiza, Edgar Adrian; Gamez Pérez, José; Santana Pérez, Orlando Onofre; Sánchez Soto, Miguel (2009-04-14)
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    BACKGROUND: Ethylene–(vinyl alcohol) (EVOH) copolymer/organo-modified montmorillonite (OMMT) composites were investigated. Composites with two different percentages by weight of OMMT were prepared using a melt-extrusion ...
  • Influence of crystallinity on the fracture toughness of poly(lactic acid)/montmorillonite nanocomposites prepared by twin-screw extrusion 

    Gamez Pérez, José; Nascimento, L.; Bou Serra, Jordi; Franco Urquiza, Edgar Adrian; Santana Pérez, Orlando Onofre; Carrasco Alonso, Félix Ángel; Maspoch Rulduà, Mª Lluïsa (2011-04-15)
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    The aim of this work was to study the effect of crystallinity degree on the thermal, mechanical, and fracture properties of poly(lactic acid)/organomodified montmorillonite (PLA/OMMT) nanocomposites. Samples with two ...
  • Influence of processing on the ethylene-vinyl alcohol (EVOH) properties: Application of the successive self-nucleation and annealing (SSA) technique 

    Franco Urquiza, Edgar Adrian; Santana Pérez, Orlando Onofre; Gamez Pérez, José; Martínez Benasat, Antonio; Maspoch Rulduà, Mª Lluïsa (2010-03)
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    Films of EVOH copolymers, processed three times by twin-screw extrusion were prepared using a cast-film line. The variation on the melt flow rate (MFR) and rheological behaviour of the films were determined, as well as ...
  • Kinetics of the thermal decomposition of processed poly(lactic acid) 

    Carrasco Alonso, Félix Ángel; Pagès Figueras, Pere; Gamez Pérez, José; Santana Pérez, Orlando Onofre; Maspoch Rulduà, Mª Lluïsa (2010-12)
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    The kinetics of the thermal decomposition of processed poly(lactic acid) has been studied and compared to that of raw material. Processing consisted of two different industrial processes: 1) Injection (with or without ...
  • Lightcarboncars: nanocompuestos CBT/POSS obtenidos por polimerización in-situ 

    Abt, Tobias Martin; Sánchez Soto, Miguel; Illescas Fernandez, Silvia; Gamez Pérez, José; Maspoch Rulduà, Mª Lluïsa (2009)
    Conference report
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    En este trabajo se han preparado e investigado nanocompuestos formados por CBT® y tres tipos diferentes de nanocargas de tipo oligómerico poliédrico (POSS), dos con funcionalidad reactiva -Trisilanolfenil POSS (T-POSS) y ...
  • PREPARACIÓN Y CARACTERIZACIÓN DE NANOCOMPUESTOS DE EVOH 44 

    Maspoch Rulduà, Mª Lluïsa; Franco Urquiza, Edgar Adrian; Gamez Pérez, José; Eriksson, Maria; Porta, Galdric; Sánchez Soto, Miguel; Santana Pérez, Orlando Onofre (2007)
    Conference report
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    Se han preparado y caracterizado films de EVOH y de diferentes mezclas con una arcilla de tipo Montmorillonita. Las mezclas se obtuvieron por el método de mezclado en fundido, utilizando una extrusora doble husillo. ...
  • Processing of poly (lactic acid) (PLA) and PLA / montmotillonite nanocomposites in a pilot plant: a study of structural changes and thermal stability 

    Pagès Figueras, Pere; Carrasco Alonso, Félix Ángel; Gamez Pérez, José; Santana Pérez, Orlando Onofre; Maspoch Rulduà, Mª Lluïsa (2010-03)
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    Se aplican procesos de transformación y tratamiento de termoplásticos (inyección, extrusión-inyección y recocido) al àcido poliláctico (PLA) y a determinados nanocompuestos PLA/montmorillonita, con objeto de estudiar las ...