Estudio de la polimerizacion de propeno utilizando diferentes catalizadores metalocenos

Detalhes bibliográficos
Autor(a) principal: Guevara, Juan
Data de Publicação: 2002
Outros Autores: Quijada, Raul, Saavedra, Pilar, Palza, Humberto, Galland, Griselda Ligia Barrera
Tipo de documento: Artigo
Idioma: spa
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/72844
Resumo: The present study reports the propylene polymerization using four different metallocene catalysts: rac-Et(Ind)2ZrCl2 (I); rac-Et(2-Me-Ind)2ZrCl2 (II); rac-Me2Si(Ind)2ZrCl2 (III) and Ph2C(Flu)(Cp)ZrCl2 (IV) in the presence of Metilaluminoxane (MAO) as cocatalyst. The polymerization carried out using different conditions of temperature, catalyst concentration, cocatalyst/catalyst ration and monomer concentration. The study was made with the aid of a statistical model of experimental planning. It was observed that the type of catalyst, and the experimental conditions of reaction have a significative influence in the catalytic activity and the properties of polymers obtained. Elevated values of activity were found at temperature of 70 C with catalysts I and III. Catalyst III produced polypropylenes with highest isotacticity. With catalyst IV were obtained syndiotactics polymers.
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spelling Guevara, JuanQuijada, RaulSaavedra, PilarPalza, HumbertoGalland, Griselda Ligia Barrera2013-07-02T01:43:02Z20020366-1644http://hdl.handle.net/10183/72844000335174The present study reports the propylene polymerization using four different metallocene catalysts: rac-Et(Ind)2ZrCl2 (I); rac-Et(2-Me-Ind)2ZrCl2 (II); rac-Me2Si(Ind)2ZrCl2 (III) and Ph2C(Flu)(Cp)ZrCl2 (IV) in the presence of Metilaluminoxane (MAO) as cocatalyst. The polymerization carried out using different conditions of temperature, catalyst concentration, cocatalyst/catalyst ration and monomer concentration. The study was made with the aid of a statistical model of experimental planning. It was observed that the type of catalyst, and the experimental conditions of reaction have a significative influence in the catalytic activity and the properties of polymers obtained. Elevated values of activity were found at temperature of 70 C with catalysts I and III. Catalyst III produced polypropylenes with highest isotacticity. With catalyst IV were obtained syndiotactics polymers.En este trabajo se reporta el estudio de la polimerización de propeno utilizando los catalizadores metalocenos: dicloruro de etilenbisindenil circonio IV racémico, rac-Et(Ind)2ZrCl2 (I); dicloruro de etilenbis(2-metil-indenil) circonio IV racémico, rac-Et(2-Me-Ind)2ZrCl2 (II); dicloruro de dimetilsililbisindenil circonio IV racémico, rac-Me2Si(Ind)2ZrCl2 (III) y dicloruro de difenilmetilindeno ciclopentadienil 9-fluorenil circonio IV, Ph2C(Flu)(Cp)ZrCl2 (IV) en presencia de metilaluminoxano (MAO) como cocatalizador. Las polimerizaciones fueron realizadas a diferentes condiciones de temperatura, concentración de catalizador, razón molar cocatalizador/catalizador y concentración de monómero. Este estudio fue elaborado con la ayuda de un modelo estadístico de planeamiento experimental. Se observó que tanto el tipo de catalizador, como las condiciones de reacción estudiadas tienen una influencia en la actividad catalítica y en las propiedades de los polímeros obtenidos. Valores elevados de actividad fueron encontrados con los catalizadores I y III a una temperatura de polimerización de 70 C. Con el catalizador III se obtuvieron los polipropilenos de mayor isotacticidad. El catalizador IV produjo polímeros sindiotácticos.application/pdfspaBoletin de la sociedad chilena de quimica. Concepción. Vol. 47, n. 2 (2002), p. 81-90Catalisadores metalocênicosPolipropilenoMetallocene catalystPolymerizationPolypropyleneTacticityCatalizador metalocenoPolimerizaciónTacticidadEstudio de la polimerizacion de propeno utilizando diferentes catalizadores metalocenosEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000335174.pdf000335174.pdfTexto completo (espanhol)application/pdf187334http://www.lume.ufrgs.br/bitstream/10183/72844/1/000335174.pdf98b97409b56bff98e58560d0d1674776MD51TEXT000335174.pdf.txt000335174.pdf.txtExtracted Texttext/plain24678http://www.lume.ufrgs.br/bitstream/10183/72844/2/000335174.pdf.txtf5b2436326f1d2529987ad17f01fa6edMD52THUMBNAIL000335174.pdf.jpg000335174.pdf.jpgGenerated Thumbnailimage/jpeg1945http://www.lume.ufrgs.br/bitstream/10183/72844/3/000335174.pdf.jpg2b283e840dc4fe7dc7a23ea318852b73MD5310183/728442018-10-09 08:59:53.072oai:www.lume.ufrgs.br:10183/72844Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-09T11:59:53Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Estudio de la polimerizacion de propeno utilizando diferentes catalizadores metalocenos
title Estudio de la polimerizacion de propeno utilizando diferentes catalizadores metalocenos
spellingShingle Estudio de la polimerizacion de propeno utilizando diferentes catalizadores metalocenos
Guevara, Juan
Catalisadores metalocênicos
Polipropileno
Metallocene catalyst
Polymerization
Polypropylene
Tacticity
Catalizador metaloceno
Polimerización
Tacticidad
title_short Estudio de la polimerizacion de propeno utilizando diferentes catalizadores metalocenos
title_full Estudio de la polimerizacion de propeno utilizando diferentes catalizadores metalocenos
title_fullStr Estudio de la polimerizacion de propeno utilizando diferentes catalizadores metalocenos
title_full_unstemmed Estudio de la polimerizacion de propeno utilizando diferentes catalizadores metalocenos
title_sort Estudio de la polimerizacion de propeno utilizando diferentes catalizadores metalocenos
author Guevara, Juan
author_facet Guevara, Juan
Quijada, Raul
Saavedra, Pilar
Palza, Humberto
Galland, Griselda Ligia Barrera
author_role author
author2 Quijada, Raul
Saavedra, Pilar
Palza, Humberto
Galland, Griselda Ligia Barrera
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Guevara, Juan
Quijada, Raul
Saavedra, Pilar
Palza, Humberto
Galland, Griselda Ligia Barrera
dc.subject.por.fl_str_mv Catalisadores metalocênicos
Polipropileno
topic Catalisadores metalocênicos
Polipropileno
Metallocene catalyst
Polymerization
Polypropylene
Tacticity
Catalizador metaloceno
Polimerización
Tacticidad
dc.subject.eng.fl_str_mv Metallocene catalyst
Polymerization
Polypropylene
Tacticity
dc.subject.spa.fl_str_mv Catalizador metaloceno
Polimerización
Tacticidad
description The present study reports the propylene polymerization using four different metallocene catalysts: rac-Et(Ind)2ZrCl2 (I); rac-Et(2-Me-Ind)2ZrCl2 (II); rac-Me2Si(Ind)2ZrCl2 (III) and Ph2C(Flu)(Cp)ZrCl2 (IV) in the presence of Metilaluminoxane (MAO) as cocatalyst. The polymerization carried out using different conditions of temperature, catalyst concentration, cocatalyst/catalyst ration and monomer concentration. The study was made with the aid of a statistical model of experimental planning. It was observed that the type of catalyst, and the experimental conditions of reaction have a significative influence in the catalytic activity and the properties of polymers obtained. Elevated values of activity were found at temperature of 70 C with catalysts I and III. Catalyst III produced polypropylenes with highest isotacticity. With catalyst IV were obtained syndiotactics polymers.
publishDate 2002
dc.date.issued.fl_str_mv 2002
dc.date.accessioned.fl_str_mv 2013-07-02T01:43:02Z
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dc.language.iso.fl_str_mv spa
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dc.relation.ispartof.pt_BR.fl_str_mv Boletin de la sociedad chilena de quimica. Concepción. Vol. 47, n. 2 (2002), p. 81-90
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