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
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/79052
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/79052
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str 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 Técnicas2025-10-22T12:12:25Zoai: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:34982025-10-22 12:12:25.421CONICET 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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score 12.982451

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