Ethylene and propylene polymerization using in situ supported Me 2Si(Ind)2ZrCl2 Catalyst: Experimental and theoretical study
- Autores
- Franceschini, Fernando C.; Tavares, Tatiana T. Da R.; Dos Santos, João H. Z.; Ferreira, María Luján; Soares, João B.P.
- Año de publicación
- 2006
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Me2Si(Ind)2ZrCl2 was in situ immobilized onto SMAO and used for ethylene and propylene polymerization in the presence of TEA or TIBA as cocatalyst. The catalytic system Me2Si(Ind) 2ZrCl2/SMAO exhibited different behavior depending on the amount and nature of the alkylaluminum employed and on the monomer type. The catalyst activity was nearly 0,4 kg polymer · g cat-1 · h-1 with both cocatalysts for propylene polymerization. Similar activities were observed for ethylene polymerization in the presence of TIBA. When ethylene was polymerized using TEA at an Al/Zr molar ratio of 250, the activity was 10 times higher. Polyethylenes made by in situ supported or homogeneous catalyst systems had practically the same melting point (T m). On the other hand, poly(propylenes) made using in situ supported catalyst systems had a slightly lower Tm than poly(propylenes) made using homogeneous catalyst systems. The nature and amount of the alkylaluminum also influenced the molar mass. The poly(propylene) molar mass was higher when TIBA was the cocatalyst. The opposite behavior was observed for the polyethylenes. Concerning the alkylaluminum concentration, the molar mass of the polymers decreased as the amount of TEA increased. In the presence of TIBA, the polyethylene's molar mass was almost the same, independent of the alkylaluminum concentration, and the poly(propylene) molar mass increased with increasing amounts of cocatalyst. The deconvolution of the GPC curves showed 2 peaks for the homogeneous system and 3 peaks for the heterogeneous in situ supported system. The only exception was observed when TEA was used at an Al/Zr molar ratio of 500, where the best fit was obtained with 2 peaks. Based on the GPC deconvolution results and on the theoretical modeling, a proposal for the active site structure was made.
Fil: Franceschini, Fernando C.. Ipiranga Petroquímica S.a.; Brasil
Fil: Tavares, Tatiana T. Da R.. Ipiranga Petroquímica S.a.; Brasil
Fil: Dos Santos, João H. Z.. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Ferreira, María Luján. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina
Fil: Soares, João B.P.. University Of Waterloo; Canadá - Materia
-
Gpc Deconvolution
In Situ Immobilization
Metallocene Catalysts
Modeling - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/36737
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spelling |
Ethylene and propylene polymerization using in situ supported Me 2Si(Ind)2ZrCl2 Catalyst: Experimental and theoretical studyFranceschini, Fernando C.Tavares, Tatiana T. Da R.Dos Santos, João H. Z.Ferreira, María LujánSoares, João B.P.Gpc DeconvolutionIn Situ ImmobilizationMetallocene CatalystsModelinghttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2Me2Si(Ind)2ZrCl2 was in situ immobilized onto SMAO and used for ethylene and propylene polymerization in the presence of TEA or TIBA as cocatalyst. The catalytic system Me2Si(Ind) 2ZrCl2/SMAO exhibited different behavior depending on the amount and nature of the alkylaluminum employed and on the monomer type. The catalyst activity was nearly 0,4 kg polymer · g cat-1 · h-1 with both cocatalysts for propylene polymerization. Similar activities were observed for ethylene polymerization in the presence of TIBA. When ethylene was polymerized using TEA at an Al/Zr molar ratio of 250, the activity was 10 times higher. Polyethylenes made by in situ supported or homogeneous catalyst systems had practically the same melting point (T m). On the other hand, poly(propylenes) made using in situ supported catalyst systems had a slightly lower Tm than poly(propylenes) made using homogeneous catalyst systems. The nature and amount of the alkylaluminum also influenced the molar mass. The poly(propylene) molar mass was higher when TIBA was the cocatalyst. The opposite behavior was observed for the polyethylenes. Concerning the alkylaluminum concentration, the molar mass of the polymers decreased as the amount of TEA increased. In the presence of TIBA, the polyethylene's molar mass was almost the same, independent of the alkylaluminum concentration, and the poly(propylene) molar mass increased with increasing amounts of cocatalyst. The deconvolution of the GPC curves showed 2 peaks for the homogeneous system and 3 peaks for the heterogeneous in situ supported system. The only exception was observed when TEA was used at an Al/Zr molar ratio of 500, where the best fit was obtained with 2 peaks. Based on the GPC deconvolution results and on the theoretical modeling, a proposal for the active site structure was made.Fil: Franceschini, Fernando C.. Ipiranga Petroquímica S.a.; BrasilFil: Tavares, Tatiana T. Da R.. Ipiranga Petroquímica S.a.; BrasilFil: Dos Santos, João H. Z.. Universidade Federal do Rio Grande do Sul; BrasilFil: Ferreira, María Luján. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; ArgentinaFil: Soares, João B.P.. University Of Waterloo; CanadáWiley VCH Verlag2006-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/36737Franceschini, Fernando C.; Tavares, Tatiana T. Da R.; Dos Santos, João H. Z.; Ferreira, María Luján; Soares, João B.P.; Ethylene and propylene polymerization using in situ supported Me 2Si(Ind)2ZrCl2 Catalyst: Experimental and theoretical study; Wiley VCH Verlag; Macromolecular Materials and Engineering (print); 291; 3; 12-2006; 279-2871438-7492CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1002/mame.200500360info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/mame.200500360/abstractinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:09:58Zoai:ri.conicet.gov.ar:11336/36737instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:09:59.1CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Ethylene and propylene polymerization using in situ supported Me 2Si(Ind)2ZrCl2 Catalyst: Experimental and theoretical study |
title |
Ethylene and propylene polymerization using in situ supported Me 2Si(Ind)2ZrCl2 Catalyst: Experimental and theoretical study |
spellingShingle |
Ethylene and propylene polymerization using in situ supported Me 2Si(Ind)2ZrCl2 Catalyst: Experimental and theoretical study Franceschini, Fernando C. Gpc Deconvolution In Situ Immobilization Metallocene Catalysts Modeling |
title_short |
Ethylene and propylene polymerization using in situ supported Me 2Si(Ind)2ZrCl2 Catalyst: Experimental and theoretical study |
title_full |
Ethylene and propylene polymerization using in situ supported Me 2Si(Ind)2ZrCl2 Catalyst: Experimental and theoretical study |
title_fullStr |
Ethylene and propylene polymerization using in situ supported Me 2Si(Ind)2ZrCl2 Catalyst: Experimental and theoretical study |
title_full_unstemmed |
Ethylene and propylene polymerization using in situ supported Me 2Si(Ind)2ZrCl2 Catalyst: Experimental and theoretical study |
title_sort |
Ethylene and propylene polymerization using in situ supported Me 2Si(Ind)2ZrCl2 Catalyst: Experimental and theoretical study |
dc.creator.none.fl_str_mv |
Franceschini, Fernando C. Tavares, Tatiana T. Da R. Dos Santos, João H. Z. Ferreira, María Luján Soares, João B.P. |
author |
Franceschini, Fernando C. |
author_facet |
Franceschini, Fernando C. Tavares, Tatiana T. Da R. Dos Santos, João H. Z. Ferreira, María Luján Soares, João B.P. |
author_role |
author |
author2 |
Tavares, Tatiana T. Da R. Dos Santos, João H. Z. Ferreira, María Luján Soares, João B.P. |
author2_role |
author author author author |
dc.subject.none.fl_str_mv |
Gpc Deconvolution In Situ Immobilization Metallocene Catalysts Modeling |
topic |
Gpc Deconvolution In Situ Immobilization Metallocene Catalysts Modeling |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/2.4 https://purl.org/becyt/ford/2 |
dc.description.none.fl_txt_mv |
Me2Si(Ind)2ZrCl2 was in situ immobilized onto SMAO and used for ethylene and propylene polymerization in the presence of TEA or TIBA as cocatalyst. The catalytic system Me2Si(Ind) 2ZrCl2/SMAO exhibited different behavior depending on the amount and nature of the alkylaluminum employed and on the monomer type. The catalyst activity was nearly 0,4 kg polymer · g cat-1 · h-1 with both cocatalysts for propylene polymerization. Similar activities were observed for ethylene polymerization in the presence of TIBA. When ethylene was polymerized using TEA at an Al/Zr molar ratio of 250, the activity was 10 times higher. Polyethylenes made by in situ supported or homogeneous catalyst systems had practically the same melting point (T m). On the other hand, poly(propylenes) made using in situ supported catalyst systems had a slightly lower Tm than poly(propylenes) made using homogeneous catalyst systems. The nature and amount of the alkylaluminum also influenced the molar mass. The poly(propylene) molar mass was higher when TIBA was the cocatalyst. The opposite behavior was observed for the polyethylenes. Concerning the alkylaluminum concentration, the molar mass of the polymers decreased as the amount of TEA increased. In the presence of TIBA, the polyethylene's molar mass was almost the same, independent of the alkylaluminum concentration, and the poly(propylene) molar mass increased with increasing amounts of cocatalyst. The deconvolution of the GPC curves showed 2 peaks for the homogeneous system and 3 peaks for the heterogeneous in situ supported system. The only exception was observed when TEA was used at an Al/Zr molar ratio of 500, where the best fit was obtained with 2 peaks. Based on the GPC deconvolution results and on the theoretical modeling, a proposal for the active site structure was made. Fil: Franceschini, Fernando C.. Ipiranga Petroquímica S.a.; Brasil Fil: Tavares, Tatiana T. Da R.. Ipiranga Petroquímica S.a.; Brasil Fil: Dos Santos, João H. Z.. Universidade Federal do Rio Grande do Sul; Brasil Fil: Ferreira, María Luján. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina Fil: Soares, João B.P.. University Of Waterloo; Canadá |
description |
Me2Si(Ind)2ZrCl2 was in situ immobilized onto SMAO and used for ethylene and propylene polymerization in the presence of TEA or TIBA as cocatalyst. The catalytic system Me2Si(Ind) 2ZrCl2/SMAO exhibited different behavior depending on the amount and nature of the alkylaluminum employed and on the monomer type. The catalyst activity was nearly 0,4 kg polymer · g cat-1 · h-1 with both cocatalysts for propylene polymerization. Similar activities were observed for ethylene polymerization in the presence of TIBA. When ethylene was polymerized using TEA at an Al/Zr molar ratio of 250, the activity was 10 times higher. Polyethylenes made by in situ supported or homogeneous catalyst systems had practically the same melting point (T m). On the other hand, poly(propylenes) made using in situ supported catalyst systems had a slightly lower Tm than poly(propylenes) made using homogeneous catalyst systems. The nature and amount of the alkylaluminum also influenced the molar mass. The poly(propylene) molar mass was higher when TIBA was the cocatalyst. The opposite behavior was observed for the polyethylenes. Concerning the alkylaluminum concentration, the molar mass of the polymers decreased as the amount of TEA increased. In the presence of TIBA, the polyethylene's molar mass was almost the same, independent of the alkylaluminum concentration, and the poly(propylene) molar mass increased with increasing amounts of cocatalyst. The deconvolution of the GPC curves showed 2 peaks for the homogeneous system and 3 peaks for the heterogeneous in situ supported system. The only exception was observed when TEA was used at an Al/Zr molar ratio of 500, where the best fit was obtained with 2 peaks. Based on the GPC deconvolution results and on the theoretical modeling, a proposal for the active site structure was made. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-12 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/36737 Franceschini, Fernando C.; Tavares, Tatiana T. Da R.; Dos Santos, João H. Z.; Ferreira, María Luján; Soares, João B.P.; Ethylene and propylene polymerization using in situ supported Me 2Si(Ind)2ZrCl2 Catalyst: Experimental and theoretical study; Wiley VCH Verlag; Macromolecular Materials and Engineering (print); 291; 3; 12-2006; 279-287 1438-7492 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/36737 |
identifier_str_mv |
Franceschini, Fernando C.; Tavares, Tatiana T. Da R.; Dos Santos, João H. Z.; Ferreira, María Luján; Soares, João B.P.; Ethylene and propylene polymerization using in situ supported Me 2Si(Ind)2ZrCl2 Catalyst: Experimental and theoretical study; Wiley VCH Verlag; Macromolecular Materials and Engineering (print); 291; 3; 12-2006; 279-287 1438-7492 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1002/mame.200500360 info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/mame.200500360/abstract |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Wiley VCH Verlag |
publisher.none.fl_str_mv |
Wiley VCH Verlag |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
_version_ |
1844613984381042688 |
score |
13.070432 |