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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/42340
Ver los metadatos del registro completo
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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 Técnicas2025-09-29T09:34:27Zoai: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:34982025-09-29 09:34:27.525CONICET 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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1844613066801545216 |
score |
13.070432 |