Ethylene polymerization over chromium supported onto SBA-15 mesoporous materials

Ethylene polymerization catalysts have been prepared by incorporation of chromium (III) acetylacetonate onto siliceous SBA-15 swelled mesoporous materials. Catalysts characterization includes DRX, FTIR, UV-vis spectroscopy, nitrogen physisorption, TGA and ICP analysis. Chromium anchorage through H-b...

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Detalles Bibliográficos
Autores: Calleja, G., Aguado, José, Carrero, A., Moreno, J.
Tipo de recurso: artículo
Fecha de publicación:2005
País:España
Institución:Universidad Rey Juan Carlos
Repositorio:BURJC-Digital. Repositorio Institucional de la Universidad Rey Juan Carlos
OAI Identifier:oai:burjcdigital.urjc.es:10115/3867
Acceso en línea:http://hdl.handle.net/10115/3867
Access Level:acceso abierto
Palabra clave:Materiales
23 Química
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spelling Ethylene polymerization over chromium supported onto SBA-15 mesoporous materialsCalleja, G.Aguado, JoséCarrero, A.Moreno, J.Materiales23 QuímicaEthylene polymerization catalysts have been prepared by incorporation of chromium (III) acetylacetonate onto siliceous SBA-15 swelled mesoporous materials. Catalysts characterization includes DRX, FTIR, UV-vis spectroscopy, nitrogen physisorption, TGA and ICP analysis. Chromium anchorage through H-bonds was observed in Cr/SBA-15 catalyst prepared by incipient wetness impregnation. On the contrary, when catalysts were prepared by grafting, a ligand exchange reaction may occur. For similar chromium contents, catalyst prepared by grafting showed higher polymerization activity than catalyst prepared by incipient wetness impregnation. Regarding polymer properties, Cr/SBA-15 catalyst prepared by impregnation gave polyethylene with slightly higher molecular weight, polydispersity, bulk density and melting temperature than polyethylene obtained from grafted catalystTecnología Química y AmbientalELSEVIER201020102005info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10115/3867reponame:BURJC-Digital. Repositorio Institucional de la Universidad Rey Juan Carlosinstname:Universidad Rey Juan CarlosInglésAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:burjcdigital.urjc.es:10115/38672026-06-24T12:48:17Z
dc.title.none.fl_str_mv Ethylene polymerization over chromium supported onto SBA-15 mesoporous materials
title Ethylene polymerization over chromium supported onto SBA-15 mesoporous materials
spellingShingle Ethylene polymerization over chromium supported onto SBA-15 mesoporous materials
Calleja, G.
Materiales
23 Química
title_short Ethylene polymerization over chromium supported onto SBA-15 mesoporous materials
title_full Ethylene polymerization over chromium supported onto SBA-15 mesoporous materials
title_fullStr Ethylene polymerization over chromium supported onto SBA-15 mesoporous materials
title_full_unstemmed Ethylene polymerization over chromium supported onto SBA-15 mesoporous materials
title_sort Ethylene polymerization over chromium supported onto SBA-15 mesoporous materials
dc.creator.none.fl_str_mv Calleja, G.
Aguado, José
Carrero, A.
Moreno, J.
author Calleja, G.
author_facet Calleja, G.
Aguado, José
Carrero, A.
Moreno, J.
author_role author
author2 Aguado, José
Carrero, A.
Moreno, J.
author2_role author
author
author
dc.subject.none.fl_str_mv Materiales
23 Química
topic Materiales
23 Química
description Ethylene polymerization catalysts have been prepared by incorporation of chromium (III) acetylacetonate onto siliceous SBA-15 swelled mesoporous materials. Catalysts characterization includes DRX, FTIR, UV-vis spectroscopy, nitrogen physisorption, TGA and ICP analysis. Chromium anchorage through H-bonds was observed in Cr/SBA-15 catalyst prepared by incipient wetness impregnation. On the contrary, when catalysts were prepared by grafting, a ligand exchange reaction may occur. For similar chromium contents, catalyst prepared by grafting showed higher polymerization activity than catalyst prepared by incipient wetness impregnation. Regarding polymer properties, Cr/SBA-15 catalyst prepared by impregnation gave polyethylene with slightly higher molecular weight, polydispersity, bulk density and melting temperature than polyethylene obtained from grafted catalyst
publishDate 2005
dc.date.none.fl_str_mv 2005
2010
2010
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10115/3867
url http://hdl.handle.net/10115/3867
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv Atribución-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Atribución-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv ELSEVIER
publisher.none.fl_str_mv ELSEVIER
dc.source.none.fl_str_mv reponame:BURJC-Digital. Repositorio Institucional de la Universidad Rey Juan Carlos
instname:Universidad Rey Juan Carlos
instname_str Universidad Rey Juan Carlos
reponame_str BURJC-Digital. Repositorio Institucional de la Universidad Rey Juan Carlos
collection BURJC-Digital. Repositorio Institucional de la Universidad Rey Juan Carlos
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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