Characterization and evaluation of supported rac -dimethylsilylenebis(indenyl)zirconium dichloride on ethylene polymerization

Autores
Franceschini, Fernando C.; Tavares, Tatiana T. da R.; Bianchini, Daniela; Alves, Maria do Carmo M.; Ferreira, María Luján; dos Santos, João H. Z.
Año de publicación
2009
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
rac‐Dimethylsilylenebis(indenyl)zirconium dichloride was grafted onto commercial methyl aluminoxane modified silica (SMAO) at different loadings (0.1–1.5 wt % Zr/SMAO). Supported catalysts were evaluated in ethylene polymerization with isoprenylaluminum as a cocatalyst. The characterization of two supported catalysts bearing 0.3 and 0.8 wt % Zr/SiO2 by extended X‐ray absorption fine structure indicated that the number and the intensity of the peaks beyond the coordination shell, associated with the next nearest neighbors, depended on the Zr concentration. For the catalyst with a higher Zr content, only one peak (2.8 Å) was observed. The catalyst with 0.3 wt % Zr/SMAO presented two small peaks at 2.8 and 3.8 Å. Polymers produced with the supported catalysts presented lower crystallinity and higher molar mass and polydispersity values in comparison to that produced by the homogeneous one. Gel permeation chromatogram deconvolution suggested the presence of four catalyst sites for the supported systems.
Fil: Franceschini, Fernando C.. Pólo Petroquímico do Sul; Brasil
Fil: Tavares, Tatiana T. da R.. Pólo Petroquímico do Sul; Brasil
Fil: Bianchini, Daniela. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Alves, Maria do Carmo M.. 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: dos Santos, João H. Z.. Universidade Federal do Rio Grande do Sul; Brasil
Materia
Computer Modeling
Metallocene Catalyst
Modeling
Nmr
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/42340
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/42340
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Characterization and evaluation of supported rac -dimethylsilylenebis(indenyl)zirconium dichloride on ethylene polymerizationFranceschini, Fernando C.Tavares, Tatiana T. da R.Bianchini, DanielaAlves, Maria do Carmo M.Ferreira, María Lujándos Santos, João H. Z.Computer ModelingMetallocene CatalystModelingNmrhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1rac‐Dimethylsilylenebis(indenyl)zirconium dichloride was grafted onto commercial methyl aluminoxane modified silica (SMAO) at different loadings (0.1–1.5 wt % Zr/SMAO). Supported catalysts were evaluated in ethylene polymerization with isoprenylaluminum as a cocatalyst. The characterization of two supported catalysts bearing 0.3 and 0.8 wt % Zr/SiO2 by extended X‐ray absorption fine structure indicated that the number and the intensity of the peaks beyond the coordination shell, associated with the next nearest neighbors, depended on the Zr concentration. For the catalyst with a higher Zr content, only one peak (2.8 Å) was observed. The catalyst with 0.3 wt % Zr/SMAO presented two small peaks at 2.8 and 3.8 Å. Polymers produced with the supported catalysts presented lower crystallinity and higher molar mass and polydispersity values in comparison to that produced by the homogeneous one. Gel permeation chromatogram deconvolution suggested the presence of four catalyst sites for the supported systems.Fil: Franceschini, Fernando C.. Pólo Petroquímico do Sul; BrasilFil: Tavares, Tatiana T. da R.. Pólo Petroquímico do Sul; BrasilFil: Bianchini, Daniela. Universidade Federal do Rio Grande do Sul; BrasilFil: Alves, Maria do Carmo M.. 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: dos Santos, João H. Z.. Universidade Federal do Rio Grande do Sul; BrasilJohn Wiley & Sons Inc2009-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/42340Franceschini, Fernando C.; Tavares, Tatiana T. da R.; Bianchini, Daniela; Alves, Maria do Carmo M.; Ferreira, María Luján; et al.; Characterization and evaluation of supported rac -dimethylsilylenebis(indenyl)zirconium dichloride on ethylene polymerization; John Wiley & Sons Inc; Journal of Applied Polymer Science; 112; 1; 4-2009; 563-5710021-8995CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1002/app.29430info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1002/app.29430info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:02:29Zoai:ri.conicet.gov.ar:11336/42340instacron: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:34982025-10-22 11:02:29.74CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Characterization and evaluation of supported rac -dimethylsilylenebis(indenyl)zirconium dichloride on ethylene polymerization
title Characterization and evaluation of supported rac -dimethylsilylenebis(indenyl)zirconium dichloride on ethylene polymerization
spellingShingle Characterization and evaluation of supported rac -dimethylsilylenebis(indenyl)zirconium dichloride on ethylene polymerization
Franceschini, Fernando C.
Computer Modeling
Metallocene Catalyst
Modeling
Nmr
title_short Characterization and evaluation of supported rac -dimethylsilylenebis(indenyl)zirconium dichloride on ethylene polymerization
title_full Characterization and evaluation of supported rac -dimethylsilylenebis(indenyl)zirconium dichloride on ethylene polymerization
title_fullStr Characterization and evaluation of supported rac -dimethylsilylenebis(indenyl)zirconium dichloride on ethylene polymerization
title_full_unstemmed Characterization and evaluation of supported rac -dimethylsilylenebis(indenyl)zirconium dichloride on ethylene polymerization
title_sort Characterization and evaluation of supported rac -dimethylsilylenebis(indenyl)zirconium dichloride on ethylene polymerization
dc.creator.none.fl_str_mv Franceschini, Fernando C.
Tavares, Tatiana T. da R.
Bianchini, Daniela
Alves, Maria do Carmo M.
Ferreira, María Luján
dos Santos, João H. Z.
author Franceschini, Fernando C.
author_facet Franceschini, Fernando C.
Tavares, Tatiana T. da R.
Bianchini, Daniela
Alves, Maria do Carmo M.
Ferreira, María Luján
dos Santos, João H. Z.
author_role author
author2 Tavares, Tatiana T. da R.
Bianchini, Daniela
Alves, Maria do Carmo M.
Ferreira, María Luján
dos Santos, João H. Z.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Computer Modeling
Metallocene Catalyst
Modeling
Nmr
topic Computer Modeling
Metallocene Catalyst
Modeling
Nmr
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv rac‐Dimethylsilylenebis(indenyl)zirconium dichloride was grafted onto commercial methyl aluminoxane modified silica (SMAO) at different loadings (0.1–1.5 wt % Zr/SMAO). Supported catalysts were evaluated in ethylene polymerization with isoprenylaluminum as a cocatalyst. The characterization of two supported catalysts bearing 0.3 and 0.8 wt % Zr/SiO2 by extended X‐ray absorption fine structure indicated that the number and the intensity of the peaks beyond the coordination shell, associated with the next nearest neighbors, depended on the Zr concentration. For the catalyst with a higher Zr content, only one peak (2.8 Å) was observed. The catalyst with 0.3 wt % Zr/SMAO presented two small peaks at 2.8 and 3.8 Å. Polymers produced with the supported catalysts presented lower crystallinity and higher molar mass and polydispersity values in comparison to that produced by the homogeneous one. Gel permeation chromatogram deconvolution suggested the presence of four catalyst sites for the supported systems.
Fil: Franceschini, Fernando C.. Pólo Petroquímico do Sul; Brasil
Fil: Tavares, Tatiana T. da R.. Pólo Petroquímico do Sul; Brasil
Fil: Bianchini, Daniela. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Alves, Maria do Carmo M.. 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: dos Santos, João H. Z.. Universidade Federal do Rio Grande do Sul; Brasil
description rac‐Dimethylsilylenebis(indenyl)zirconium dichloride was grafted onto commercial methyl aluminoxane modified silica (SMAO) at different loadings (0.1–1.5 wt % Zr/SMAO). Supported catalysts were evaluated in ethylene polymerization with isoprenylaluminum as a cocatalyst. The characterization of two supported catalysts bearing 0.3 and 0.8 wt % Zr/SiO2 by extended X‐ray absorption fine structure indicated that the number and the intensity of the peaks beyond the coordination shell, associated with the next nearest neighbors, depended on the Zr concentration. For the catalyst with a higher Zr content, only one peak (2.8 Å) was observed. The catalyst with 0.3 wt % Zr/SMAO presented two small peaks at 2.8 and 3.8 Å. Polymers produced with the supported catalysts presented lower crystallinity and higher molar mass and polydispersity values in comparison to that produced by the homogeneous one. Gel permeation chromatogram deconvolution suggested the presence of four catalyst sites for the supported systems.
publishDate 2009
dc.date.none.fl_str_mv 2009-04
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/11336/42340
Franceschini, Fernando C.; Tavares, Tatiana T. da R.; Bianchini, Daniela; Alves, Maria do Carmo M.; Ferreira, María Luján; et al.; Characterization and evaluation of supported rac -dimethylsilylenebis(indenyl)zirconium dichloride on ethylene polymerization; John Wiley & Sons Inc; Journal of Applied Polymer Science; 112; 1; 4-2009; 563-571
0021-8995
CONICET Digital
CONICET
url http://hdl.handle.net/11336/42340
identifier_str_mv Franceschini, Fernando C.; Tavares, Tatiana T. da R.; Bianchini, Daniela; Alves, Maria do Carmo M.; Ferreira, María Luján; et al.; Characterization and evaluation of supported rac -dimethylsilylenebis(indenyl)zirconium dichloride on ethylene polymerization; John Wiley & Sons Inc; Journal of Applied Polymer Science; 112; 1; 4-2009; 563-571
0021-8995
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/app.29430
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1002/app.29430
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 John Wiley & Sons Inc
publisher.none.fl_str_mv John Wiley & Sons Inc
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
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score 12.982451

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