Polypropylene obtained through zeolite supported catalysts

Detalhes bibliográficos
Autor(a) principal: Bastos,Queli C.
Data de Publicação: 2004
Outros Autores: Marques,Maria de Fátima V.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Polímeros (São Carlos. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282004000400010
Resumo: Propylene polymerizations were carried out with f2C(Flu)(Cp)ZrCl2 and SiMe2(Ind)2ZrCl2 catalysts supported on silica, zeolite sodic mordenite (NaM) and acid mordenite (HM). The polymerizations were performed at different temperatures and varying aluminium/zirconium molar ratios ([Al]/[Zr]). The effect of these reaction parameters on the catalyst activity was investigated using a proposed statistical experimental planning. In the case of f2C(Flu)(Cp)ZrCl2, SiO2 and NaM were used as support and the catalyst performance evaluated using toluene and pentane as polymerization solvent. The molecular weight, molecular weight distribution, melting point and crystallinity of the polymers were examined. The results indicate very high activities for the syndiospecific heterogeneous system. Also, the polymers obtained had superior Mw and stereoregularity.
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spelling Polypropylene obtained through zeolite supported catalystsIsotactic polypropylenesyndiotactic polypropylenemetallocene catalystsupportsPropylene polymerizations were carried out with f2C(Flu)(Cp)ZrCl2 and SiMe2(Ind)2ZrCl2 catalysts supported on silica, zeolite sodic mordenite (NaM) and acid mordenite (HM). The polymerizations were performed at different temperatures and varying aluminium/zirconium molar ratios ([Al]/[Zr]). The effect of these reaction parameters on the catalyst activity was investigated using a proposed statistical experimental planning. In the case of f2C(Flu)(Cp)ZrCl2, SiO2 and NaM were used as support and the catalyst performance evaluated using toluene and pentane as polymerization solvent. The molecular weight, molecular weight distribution, melting point and crystallinity of the polymers were examined. The results indicate very high activities for the syndiospecific heterogeneous system. Also, the polymers obtained had superior Mw and stereoregularity.Associação Brasileira de Polímeros2004-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282004000400010Polímeros v.14 n.4 2004reponame:Polímeros (São Carlos. Online)instname:Associação Brasileira de Polímeros (ABPol)instacron:ABPO10.1590/S0104-14282004000400010info:eu-repo/semantics/openAccessBastos,Queli C.Marques,Maria de Fátima V.eng2004-11-11T00:00:00Zoai:scielo:S0104-14282004000400010Revistahttp://www.scielo.br/pohttps://old.scielo.br/oai/scielo-oai.php||revista@abpol.org.br1678-51690104-1428opendoar:2004-11-11T00:00Polímeros (São Carlos. Online) - Associação Brasileira de Polímeros (ABPol)false
dc.title.none.fl_str_mv Polypropylene obtained through zeolite supported catalysts
title Polypropylene obtained through zeolite supported catalysts
spellingShingle Polypropylene obtained through zeolite supported catalysts
Bastos,Queli C.
Isotactic polypropylene
syndiotactic polypropylene
metallocene catalyst
supports
title_short Polypropylene obtained through zeolite supported catalysts
title_full Polypropylene obtained through zeolite supported catalysts
title_fullStr Polypropylene obtained through zeolite supported catalysts
title_full_unstemmed Polypropylene obtained through zeolite supported catalysts
title_sort Polypropylene obtained through zeolite supported catalysts
author Bastos,Queli C.
author_facet Bastos,Queli C.
Marques,Maria de Fátima V.
author_role author
author2 Marques,Maria de Fátima V.
author2_role author
dc.contributor.author.fl_str_mv Bastos,Queli C.
Marques,Maria de Fátima V.
dc.subject.por.fl_str_mv Isotactic polypropylene
syndiotactic polypropylene
metallocene catalyst
supports
topic Isotactic polypropylene
syndiotactic polypropylene
metallocene catalyst
supports
description Propylene polymerizations were carried out with f2C(Flu)(Cp)ZrCl2 and SiMe2(Ind)2ZrCl2 catalysts supported on silica, zeolite sodic mordenite (NaM) and acid mordenite (HM). The polymerizations were performed at different temperatures and varying aluminium/zirconium molar ratios ([Al]/[Zr]). The effect of these reaction parameters on the catalyst activity was investigated using a proposed statistical experimental planning. In the case of f2C(Flu)(Cp)ZrCl2, SiO2 and NaM were used as support and the catalyst performance evaluated using toluene and pentane as polymerization solvent. The molecular weight, molecular weight distribution, melting point and crystallinity of the polymers were examined. The results indicate very high activities for the syndiospecific heterogeneous system. Also, the polymers obtained had superior Mw and stereoregularity.
publishDate 2004
dc.date.none.fl_str_mv 2004-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282004000400010
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282004000400010
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0104-14282004000400010
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Associação Brasileira de Polímeros
publisher.none.fl_str_mv Associação Brasileira de Polímeros
dc.source.none.fl_str_mv Polímeros v.14 n.4 2004
reponame:Polímeros (São Carlos. Online)
instname:Associação Brasileira de Polímeros (ABPol)
instacron:ABPO
instname_str Associação Brasileira de Polímeros (ABPol)
instacron_str ABPO
institution ABPO
reponame_str Polímeros (São Carlos. Online)
collection Polímeros (São Carlos. Online)
repository.name.fl_str_mv Polímeros (São Carlos. Online) - Associação Brasileira de Polímeros (ABPol)
repository.mail.fl_str_mv ||revista@abpol.org.br
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