Výsledky vyhledávání - "Norky Villarreal"

Nanocomposites of ABS and sepiolite: Study of different clay modification processes

Autor: Norky Villarreal-Bastardo, José María Pastor, D. García-López, Félix Carlos Basurto, Juan Carlos Merino

Publikováno v: Composites Part B: Engineering. 43:2222-2229

Melt compounding of acrylonitrile–butadiene–styrene (ABS) matrix and nanocomposites have been studied in order to evaluate the optimal modification process for sepiolite. Different screw speeds were tested to elucidate possible degradations relat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ec6d8bc0e93cb0ec4f9d8dd2c5a16689
https://doi.org/10.1016/j.compositesb.2012.02.023

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The use of SSA fractionation to detect changes in the molecular structure of model ethylene–butene copolymers modified by peroxide crosslinking

Autor: Claudio Javier Pérez, Norky Villarreal, José María Pastor, José M. Carella, Marcelo Daniel Failla, Enrique M. Vallés

Publikováno v: Polymer Degradation and Stability. 94:1639-1645

Four model ethylene–butene copolymers of different molecular weights modified with various concentrations of peroxide were analyzed by a DSC based successive self annealing method. The original copolymers had the same intra and intermolecular homog

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d9db5f4c1361f9f0052d6b08469d0ec1
https://doi.org/10.1016/j.polymdegradstab.2009.07.002

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In situ fiber composites based on metallocene polyethylene matrices

Autor: Rosestela Perera, Miguel Angel Cárdenas, José María Pastor, Norky Villarreal, Carmen Rosales

Publikováno v: Journal of Applied Polymer Science. 106:2298-2312

Binary blends of metallocene polyethylenes with polyethylenes and polypropylene were made in a co-rotating twin-screw extruder. A stretching process was carried out afterwards in the melt state at the extruder's exit to study the effect of the induce

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1906c3ec4913760f7ebb1a0de9a03a95
https://doi.org/10.1002/app.26927

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Characterization of electron beam irradiation blends based on metallocene ethylene-1-octene copolymer

Autor: Isabel Gobernado-Mitre, José María Pastor, Norky Villarreal, Juan Carlos Merino, Miguel Angel Cárdenas

Publikováno v: Journal of Polymer Science Part B: Polymer Physics. 45:2432-2440

Binary blends using metallocene ethylene-1-octene copolymer as matrix were prepared and subjected to electron beam (EB) irradiation (50, 100, and 200 kGy). Gel content and melt flow index values indicated that the blends were crosslinking. Fourier tr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f1662b3e9e82632f06990778d8ee989f
https://doi.org/10.1002/polb.21259

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Thermal Properties and SSA Fractionation of Metallocene Ethylene-Oct-1-ene Copolymers with High Comonomer Content Cross-linked by Dicumyl Peroxide orβ-Radiation

Autor: Norky Villarreal, Javier Nicolás, José María Pastor, Isabel Gobernado-Mitre, Juan Carlos Merino

Publikováno v: Macromolecular Chemistry and Physics. 204:2212-2221

Two metallocene ethylene-oct-1-ene copolymer, differing in comonomer content and in molecular weight, were cross-linked either by dicumyl peroxide or β-radiation. The effect of high comonomer content on the crystalline morphology, once the materials

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eba60e9daeea756b31faf154fc84c54a
https://doi.org/10.1002/macp.200300096

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Use of the Raman-Active Longitudinal Acoustic Mode in the Characterization of Reactively Extruded Polyethylenes

Autor: Rosestela Perera, José María Pastor, Juan Carlos Merino, Carmen Rosales, Norky Villarreal

Publikováno v: Macromolecular Chemistry and Physics. 203:238-244

Full Paper: Segmented polyurethanes (PSEU) were synthesized from polydimethylsiloxane diol (PSi) mixed with poly(ethylene glycol) (PEG) in different ratios as soft segment, 4,4'-diphenylmethane diisocyanate as hard segment, and ethylene glycol as cha

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f9ed40ca536e78fa80d3ed6163bebebd
https://doi.org/10.1002/1521-3935(20020101)203:1<238::aid-macp238>3.0.co

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