Comparative study of propylene polymerization using Me2Si(RInd)2ZrCl2/SiO2-SMAO/ AlR3 and Me2Si(RInd)2ZrCl2/MAO (R = Me, H)
- Autores
- Franceschini, F. C.; Tavares, T. T. da R.; dos Santos, J. H. Z.; Soares, J. B. P.; Ferreira, María Luján
- Año de publicación
- 2007
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- A mechanistic analysis of propylene polymerization was performed, in which the catalyst system was Me2Si(R1Ind)2ZrCl2/SMAO/AlR 3 2 (in situ supported catalyst onto MAO-modified silica) or Me2Si(R1Ind)2ZrCl2/MAO (homogeneous), where R1 = H or CH3, cocatalyzed by AlR3 2 = TEA (triethylaluminum), IPRA (isoprenylaluminum), or TIBA (triisobutylaluminum). The catalyst activity of the homogeneous system Me2Si(2-Me-Ind)2ZrCl2/MAO was almost 8 times higher than that observed for Me2Si(Ind)2ZrCl2/MAO (38 vs 4.6 kg PP/g cat h), while the polypropylene molar mass was 3 times higher (Mw: 93 vs 34 kg/mol). Conversely, the in situ supported systems Me2Si(Ind)2ZrCl2/SMAO/AlR3 and Me2Si(2-Me-Ind)2ZrCl2/SMAO/AlR 3 showed similar activities, ranging from 0.2 to 1.5 kg PP/g cat h. The molar mass of the resulting polymers prepared using the in situ procedure was dependent on the AlR3 nature and on the Al/Zr ratio. Generally, the heterogeneous catalysts produced PP with higher molecular weights than that obtained with homogeneous ones. The influence of the alkylaluminum, used as the cocatalyst, on the chain-transfer termination reaction to the alkyl compound was evident from the activity and the molecular weight of the produced polymers.
Fil: Franceschini, F. C.. Pólo Petroquímico do Sul; Brasil
Fil: Tavares, T. T. da R.. Pólo Petroquímico do Sul; Brasil
Fil: dos Santos, J. H. Z.. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Soares, J. B. P.. University of Waterloo; Canadá
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 - Materia
-
In Situ Immobilization
Metallocene Catalyst
Polypropylene - 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:11336/79052
Ver los metadatos del registro completo
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oai:ri.conicet.gov.ar:11336/79052 |
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repository_id_str |
3498 |
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CONICET Digital (CONICET) |
spelling |
Comparative study of propylene polymerization using Me2Si(RInd)2ZrCl2/SiO2-SMAO/ AlR3 and Me2Si(RInd)2ZrCl2/MAO (R = Me, H)Franceschini, F. C.Tavares, T. T. da R.dos Santos, J. H. Z.Soares, J. B. P.Ferreira, María LujánIn Situ ImmobilizationMetallocene CatalystPolypropylenehttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2A mechanistic analysis of propylene polymerization was performed, in which the catalyst system was Me2Si(R1Ind)2ZrCl2/SMAO/AlR 3 2 (in situ supported catalyst onto MAO-modified silica) or Me2Si(R1Ind)2ZrCl2/MAO (homogeneous), where R1 = H or CH3, cocatalyzed by AlR3 2 = TEA (triethylaluminum), IPRA (isoprenylaluminum), or TIBA (triisobutylaluminum). The catalyst activity of the homogeneous system Me2Si(2-Me-Ind)2ZrCl2/MAO was almost 8 times higher than that observed for Me2Si(Ind)2ZrCl2/MAO (38 vs 4.6 kg PP/g cat h), while the polypropylene molar mass was 3 times higher (Mw: 93 vs 34 kg/mol). Conversely, the in situ supported systems Me2Si(Ind)2ZrCl2/SMAO/AlR3 and Me2Si(2-Me-Ind)2ZrCl2/SMAO/AlR 3 showed similar activities, ranging from 0.2 to 1.5 kg PP/g cat h. The molar mass of the resulting polymers prepared using the in situ procedure was dependent on the AlR3 nature and on the Al/Zr ratio. Generally, the heterogeneous catalysts produced PP with higher molecular weights than that obtained with homogeneous ones. The influence of the alkylaluminum, used as the cocatalyst, on the chain-transfer termination reaction to the alkyl compound was evident from the activity and the molecular weight of the produced polymers.Fil: Franceschini, F. C.. Pólo Petroquímico do Sul; BrasilFil: Tavares, T. T. da R.. Pólo Petroquímico do Sul; BrasilFil: dos Santos, J. H. Z.. Universidade Federal do Rio Grande do Sul; BrasilFil: Soares, J. B. P.. University of Waterloo; CanadáFil: 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; ArgentinaElsevier2007-03-23info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/79052Franceschini, F. C.; Tavares, T. T. da R.; dos Santos, J. H. Z.; Soares, J. B. P.; Ferreira, María Luján; Comparative study of propylene polymerization using Me2Si(RInd)2ZrCl2/SiO2-SMAO/ AlR3 and Me2Si(RInd)2ZrCl2/MAO (R = Me, H); Elsevier; Polymer; 48; 7; 23-3-2007; 1940-19530032-3861CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0032386107001103info:eu-repo/semantics/altIdentifier/doi/10.1016/j.polymer.2007.01.062info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:40:01Zoai:ri.conicet.gov.ar:11336/79052instacron: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 10:40:02.08CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Comparative study of propylene polymerization using Me2Si(RInd)2ZrCl2/SiO2-SMAO/ AlR3 and Me2Si(RInd)2ZrCl2/MAO (R = Me, H) |
title |
Comparative study of propylene polymerization using Me2Si(RInd)2ZrCl2/SiO2-SMAO/ AlR3 and Me2Si(RInd)2ZrCl2/MAO (R = Me, H) |
spellingShingle |
Comparative study of propylene polymerization using Me2Si(RInd)2ZrCl2/SiO2-SMAO/ AlR3 and Me2Si(RInd)2ZrCl2/MAO (R = Me, H) Franceschini, F. C. In Situ Immobilization Metallocene Catalyst Polypropylene |
title_short |
Comparative study of propylene polymerization using Me2Si(RInd)2ZrCl2/SiO2-SMAO/ AlR3 and Me2Si(RInd)2ZrCl2/MAO (R = Me, H) |
title_full |
Comparative study of propylene polymerization using Me2Si(RInd)2ZrCl2/SiO2-SMAO/ AlR3 and Me2Si(RInd)2ZrCl2/MAO (R = Me, H) |
title_fullStr |
Comparative study of propylene polymerization using Me2Si(RInd)2ZrCl2/SiO2-SMAO/ AlR3 and Me2Si(RInd)2ZrCl2/MAO (R = Me, H) |
title_full_unstemmed |
Comparative study of propylene polymerization using Me2Si(RInd)2ZrCl2/SiO2-SMAO/ AlR3 and Me2Si(RInd)2ZrCl2/MAO (R = Me, H) |
title_sort |
Comparative study of propylene polymerization using Me2Si(RInd)2ZrCl2/SiO2-SMAO/ AlR3 and Me2Si(RInd)2ZrCl2/MAO (R = Me, H) |
dc.creator.none.fl_str_mv |
Franceschini, F. C. Tavares, T. T. da R. dos Santos, J. H. Z. Soares, J. B. P. Ferreira, María Luján |
author |
Franceschini, F. C. |
author_facet |
Franceschini, F. C. Tavares, T. T. da R. dos Santos, J. H. Z. Soares, J. B. P. Ferreira, María Luján |
author_role |
author |
author2 |
Tavares, T. T. da R. dos Santos, J. H. Z. Soares, J. B. P. Ferreira, María Luján |
author2_role |
author author author author |
dc.subject.none.fl_str_mv |
In Situ Immobilization Metallocene Catalyst Polypropylene |
topic |
In Situ Immobilization Metallocene Catalyst Polypropylene |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/2.4 https://purl.org/becyt/ford/2 |
dc.description.none.fl_txt_mv |
A mechanistic analysis of propylene polymerization was performed, in which the catalyst system was Me2Si(R1Ind)2ZrCl2/SMAO/AlR 3 2 (in situ supported catalyst onto MAO-modified silica) or Me2Si(R1Ind)2ZrCl2/MAO (homogeneous), where R1 = H or CH3, cocatalyzed by AlR3 2 = TEA (triethylaluminum), IPRA (isoprenylaluminum), or TIBA (triisobutylaluminum). The catalyst activity of the homogeneous system Me2Si(2-Me-Ind)2ZrCl2/MAO was almost 8 times higher than that observed for Me2Si(Ind)2ZrCl2/MAO (38 vs 4.6 kg PP/g cat h), while the polypropylene molar mass was 3 times higher (Mw: 93 vs 34 kg/mol). Conversely, the in situ supported systems Me2Si(Ind)2ZrCl2/SMAO/AlR3 and Me2Si(2-Me-Ind)2ZrCl2/SMAO/AlR 3 showed similar activities, ranging from 0.2 to 1.5 kg PP/g cat h. The molar mass of the resulting polymers prepared using the in situ procedure was dependent on the AlR3 nature and on the Al/Zr ratio. Generally, the heterogeneous catalysts produced PP with higher molecular weights than that obtained with homogeneous ones. The influence of the alkylaluminum, used as the cocatalyst, on the chain-transfer termination reaction to the alkyl compound was evident from the activity and the molecular weight of the produced polymers. Fil: Franceschini, F. C.. Pólo Petroquímico do Sul; Brasil Fil: Tavares, T. T. da R.. Pólo Petroquímico do Sul; Brasil Fil: dos Santos, J. H. Z.. Universidade Federal do Rio Grande do Sul; Brasil Fil: Soares, J. B. P.. University of Waterloo; Canadá 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 |
description |
A mechanistic analysis of propylene polymerization was performed, in which the catalyst system was Me2Si(R1Ind)2ZrCl2/SMAO/AlR 3 2 (in situ supported catalyst onto MAO-modified silica) or Me2Si(R1Ind)2ZrCl2/MAO (homogeneous), where R1 = H or CH3, cocatalyzed by AlR3 2 = TEA (triethylaluminum), IPRA (isoprenylaluminum), or TIBA (triisobutylaluminum). The catalyst activity of the homogeneous system Me2Si(2-Me-Ind)2ZrCl2/MAO was almost 8 times higher than that observed for Me2Si(Ind)2ZrCl2/MAO (38 vs 4.6 kg PP/g cat h), while the polypropylene molar mass was 3 times higher (Mw: 93 vs 34 kg/mol). Conversely, the in situ supported systems Me2Si(Ind)2ZrCl2/SMAO/AlR3 and Me2Si(2-Me-Ind)2ZrCl2/SMAO/AlR 3 showed similar activities, ranging from 0.2 to 1.5 kg PP/g cat h. The molar mass of the resulting polymers prepared using the in situ procedure was dependent on the AlR3 nature and on the Al/Zr ratio. Generally, the heterogeneous catalysts produced PP with higher molecular weights than that obtained with homogeneous ones. The influence of the alkylaluminum, used as the cocatalyst, on the chain-transfer termination reaction to the alkyl compound was evident from the activity and the molecular weight of the produced polymers. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007-03-23 |
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/11336/79052 Franceschini, F. C.; Tavares, T. T. da R.; dos Santos, J. H. Z.; Soares, J. B. P.; Ferreira, María Luján; Comparative study of propylene polymerization using Me2Si(RInd)2ZrCl2/SiO2-SMAO/ AlR3 and Me2Si(RInd)2ZrCl2/MAO (R = Me, H); Elsevier; Polymer; 48; 7; 23-3-2007; 1940-1953 0032-3861 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/79052 |
identifier_str_mv |
Franceschini, F. C.; Tavares, T. T. da R.; dos Santos, J. H. Z.; Soares, J. B. P.; Ferreira, María Luján; Comparative study of propylene polymerization using Me2Si(RInd)2ZrCl2/SiO2-SMAO/ AlR3 and Me2Si(RInd)2ZrCl2/MAO (R = Me, H); Elsevier; Polymer; 48; 7; 23-3-2007; 1940-1953 0032-3861 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0032386107001103 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.polymer.2007.01.062 |
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 |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
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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1844614427197833216 |
score |
13.070432 |