Browsing by Author "Quijada Abarca, Juan"
Now showing items 1-20 of 21
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Palza Cordero, Humberto; Quijada Abarca, Juan; Delgado, Katherine (SAGE, 2015)The addition of metal particles, for instance, silver or copper, into polymer matrices is a relevant strategy producing novel antimicrobial materials. By using two particles with diameters around 10nm and 45 mu m, and ...
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Méndez, Rodrigo; Constant, Benjamín; Garzón, Cristhian; Nisar, Muhammad; Nachtigall, Sônia Marlí Bohrz; Quijada Abarca, Juan (Elsevier, 2017)In this study, polycaprolactam (PA6) nanocomposites with thermally reduced graphene oxide (TrGO) and carbon nanotubes (CNTs) were prepared by melt blending with the aim of obtaining films with improvements in permeability ...
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Palza Cordero, Humberto; López Majada, Juan M.; Quijada Abarca, Juan; Pereña, José M.; Benavente, Rosario; Pérez, Ernesto; Cerrada, María (WILEY-V C H VERLAG GMBH, 2008-11)The structure and properties have been comprehensively studied for metallocene copolymers of propylene-1-hexene (CiPH) and propylene-1-octadecene (CiPOD). The comonomer content constitutes the most important factor ...
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Silva Leyton, Rodrigo Sebastián (Universidad de Chile, 2018)La cantidad de alimentos que se pierden por factores asociados al envasado y la creciente industria frutícola en Chile, han motivado una creciente investigación en el área de envasado activo. Es por ello que, en la presente ...
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Flores Villanueva, Loreto Antonia (Universidad de Chile, 2022)El PLA es un polímero con memoria de forma irreversible, al calentarlo sobre su temperatura de transición puede ser deformado, mantener esta forma al enfriarse y retornar a su forma original al ser expuesto al calor. Si ...
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Lazo Acuña, Andrea Paola (Universidad de Chile, 2011)En este trabajo se estudia el proceso de cementación de molibdeno sobre lámina de cinc en solución amoniacal, el cual involucra reacciones anódicas de oxidación de cinc y reacciones catódicas entre las que se incluyen la ...
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Reyes Wagner, Paula Isidora (Universidad de Chile, 2017)Nanopartículas de grafito oxidado y grafito oxidado térmicamente reducido a 600°C y a 800°C (GO, TrGO600° y TrGO800°, respectivamente), fueron sintetizadas a partir del método de Hummers-Offeman y, posteriormente, utilizadas ...
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López Majada, Juan M.; Palza Cordero, Humberto; Guevara, Juan Luis; Quijada Abarca, Juan; Martínez, M. C.; Benavente, Rosario; Pereña, J. M.; Pérez, E.; Cerrada, María (JOHN WILEY, 2006-04-15)The relationships between the structure and properties have been established for copolymers of propylene and 1-hexene synthesized with an isotactic metallocene catalyst system. The most important factor affecting the ...
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Vergara Morales, Cristóbal Alejandro (Universidad de Chile, 2022)Las emisiones de Gases de Efecto Invernadero a nivel mundial son los responsables del calentamiento global. El uso de energías renovables pueden reducir el uso de los combustibles fósiles, encargados de la producción del ...
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Peoples, Brian C.; Vega, Gala De la; Valdebenito, Carolina; Quijada Abarca, Juan; Ibañez, Andrés; Valderrama, Mauricio; Rojas Cortés, René (Elsevier, 2012)In this contribution the synthesis and polymerization activity of the nickel complexes [NiBr2{N0-(2,6- diisopropylphenyl)-N-[1-(2,6-diisopropylphenylimine)ethyl]-N-(2,3,4,5,6-pentafluorophenyl)acetam idine}] (2), ...
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Sagredo Maire, Christian Ignacio (Universidad de Chile, 2017)El avance tecnológico y científico ha promovido la fabricación de materiales inteligentes , capaces de recibir información de su entorno, interpretarla y, así, cambiar sus funcionalidades de acuerdo a su propósito ...
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Pavoski, Giovani; Maraschin, Thuany; Milani, Marcéo A.; Azambuja, Denise S.; Quijada Abarca, Juan; Stein Moura, Cássio; Basso, Nara de Sousa; Barrera Galland, Griselda (Elsevier, 2015)The use of graphite and polyolefins as starting materials to prepare nanocomposites is convenient because both are inexpensive and have very different properties, one is conductive and the other is insulating. The formation ...
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Milani, Marcéo A.; González, Darío; Quijada Abarca, Juan; Basso, Nara de Sousa; Cerrada, Maria L.; Azambuja, Denise S.; Galland, Griselda B. (Elsevier, 2013)This study investigates the synthesis, characterization and properties of isotactic polypropylene/graphene nanosheet nanocomposites (iPP/GNS). These nanocomposites were prepared by in situ polymerization using the ...
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Peoples, Brian C.; Dougnac, Vivianne N.; Galland, Griselda B.; Rabagliati, Franco M.; Quijada Abarca, Juan (Springer, 2013)The copolymerization of ethylene with dicyclopentadiene (DCP) using the metallocene catalyst rac-dimethylsilylbis(indenyl)zirconium dichloride (Me2Si(Ind)2ZrCl2) proceeds with high activity producing materials with ...
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Yave, Wilfredo; Quijada Abarca, Juan; Serafini, Daniel; Lloyd, Douglas R. (WILEY-V C H VERLAG GMBH, 2006-02-10)Poly[propylene-co-(1-hexene)], one example of a "tailor-made poly(propylene)", was synthesized using an iso-specific metallocene catalyst in order to study the influence of copolymer composition on the pore size of isotactic ...
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Zapata, Paula A.; Belver, Carolina; Quijada Abarca, Juan; Aranda, Pilar; Ruiz Hitzky, Eduardo (Elsevier, 2013)Two clay organo-heterostructures have been prepared and employed as fillers and catalyst supports for the development of polyethylene–clay nanocomposites. The new silica–clay organo-heterostructures have been obtained ...
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Rabagliati, Franco M.; Yáñez, Daniela E.; Canales, Daniel; Quijada Abarca, Juan; Zapata, Paula A. (Springer, 2013)The copolymerization of styrene with cyclohexene, 1-methyl-1-cyclohexene, and norbornene using ethenylbisindenylzirconium dichloride and methylaluminoxane, Et(Ind)2ZrCl2-MAO, initiating systems has been tested. The ...
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Quijada Abarca, Juan; Guevara, Juan Luis; Galland, Griselda B.; Rabagliati, Franco M.; López Majada, Juan M. (ELSEVIER SCI LTD, 2005-02-14)Copolymerization of propene with two alpha-olefins (1-hexene and 1-octadecene) using iso- and syndioselective metallocene catalysts (EtInd(2)ZrCl(2), Et(2-MeInd)(2)ZrCl2, Me(2)SiInd(2)ZrCl(2), Ph(2)CFluCpZrCl(2) and ...
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Nisar, Muhammad; Pérez Bergmann, Carlos; Geshev, Julián; Quijada Abarca, Juan; Maraschin, Thuany; de Souza Basso, Nara R.; Barrera, Eliana G.; Galland, Griselda Barrera (John Wiley, 2017)Semi-conducting polyethylene (PE) nanocomposites with outstanding magnetic properties at room temperature were synthesized. These exceptional properties, for a diamagnetic and insulating matrix as PE, were obtained by ...
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Milani, Marceo A.; González, Darío; Quijada Abarca, Juan; Benavente, Rosario; Arranz-Andrés, Javier; Galland, Griselda B. (Elsevier, 2015)Poly(propylene-1-octene)/graphite nanosheet (PPC8/GNS) nanocomposites with different comonomer and graphite nanosheet (GNS) contents were synthesized by in situ polymerization using metallocene catalyst. There was a ...