Browsing by Author "Quijada Abarca, Juan"
Now showing items 1-15 of 15
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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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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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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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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 ...
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Palza Cordero, Humberto; Gutiérrez, Sebastián; Delgado, Katherine; Salazar, Oriana; Fuenzalida Escobar, Víctor; Avila, Jonathan I.; Figueroa, Guillermo; Quijada Abarca, Juan (Wiley InterScience, 2010)A set of poly(propylene) composites containing different amounts of copper nanoparticles (CNP) were prepared by the melt mixed method and their antimicrobial behavior was quantitatively studied. The time needed to reduce ...