Characterization of metallocene Epdm terpolymers with high diene and propylene content crosslinked by dicumyl peroxide and β-radiation

Autores
Nicolás, Javier; Ressia, Jorge Aníbal; Valles, Enrique Marcelo; Merino, Juan Carlos; Pastor, José María
Año de publicación
2004
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Two metallocene EPDMs with the same weight fraction of ethylene but differing in diene content were crosslinked, either by dicumyl peroxide (DCP) or β-radiation. The effect of different diene and propylene content on the molecular structure and the mechanical properties once the materials were crosslinked was studied. The final gel content was very high due to the large level of unsaturations. The crosslinking process was monitored by FTIR spectroscopy by following the decay of unsaturations and the variation of the carbonyl groups that are related to the oxidation grade. It was found that β-radiation crosslinked samples exhibited a lower oxidation grade than those crosslinked by DCP. An oscillant disc rheometer was employed to follow the evolution of the rheological properties, the scorch time, and the time corresponding to full cure during the crosslinking reaction with DCP. In addition, in order to characterize the state of cure we have studied the rheological properties in shear employing a dynamic parallel plate geometry. These results were correlated with those obtained from the molecular characterization of the soluble fraction by size exclusion chromatography. The experiments indicate that, at low irradiation doses, there is a high rate of chain scission reactions that cause an important decrease in storage modulus. Whereas, at high irradiation doses the rate of chain scission reactions diminishes, thus the storage modulus increases but it still remains at lower levels than those corresponding to the original terpolymers. The tensile properties, hardness (Shore A) and compression set tests also suggest the presence of chain scission reactions.
Fil: Nicolás, Javier. Universidad de Valladolid; España
Fil: Ressia, Jorge Aníbal. 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: Valles, Enrique Marcelo. 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: Merino, Juan Carlos. Universidad de Valladolid; España
Fil: Pastor, José María. Universidad de Valladolid; España
Materia
BETA-RADIATION
CROSSLINKING
EPDM
METALLOCENE CATALYSTS
PEROXIDE
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:11336/97529
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/97529
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Characterization of metallocene Epdm terpolymers with high diene and propylene content crosslinked by dicumyl peroxide and β-radiationNicolás, JavierRessia, Jorge AníbalValles, Enrique MarceloMerino, Juan CarlosPastor, José MaríaBETA-RADIATIONCROSSLINKINGEPDMMETALLOCENE CATALYSTSPEROXIDEhttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2Two metallocene EPDMs with the same weight fraction of ethylene but differing in diene content were crosslinked, either by dicumyl peroxide (DCP) or β-radiation. The effect of different diene and propylene content on the molecular structure and the mechanical properties once the materials were crosslinked was studied. The final gel content was very high due to the large level of unsaturations. The crosslinking process was monitored by FTIR spectroscopy by following the decay of unsaturations and the variation of the carbonyl groups that are related to the oxidation grade. It was found that β-radiation crosslinked samples exhibited a lower oxidation grade than those crosslinked by DCP. An oscillant disc rheometer was employed to follow the evolution of the rheological properties, the scorch time, and the time corresponding to full cure during the crosslinking reaction with DCP. In addition, in order to characterize the state of cure we have studied the rheological properties in shear employing a dynamic parallel plate geometry. These results were correlated with those obtained from the molecular characterization of the soluble fraction by size exclusion chromatography. The experiments indicate that, at low irradiation doses, there is a high rate of chain scission reactions that cause an important decrease in storage modulus. Whereas, at high irradiation doses the rate of chain scission reactions diminishes, thus the storage modulus increases but it still remains at lower levels than those corresponding to the original terpolymers. The tensile properties, hardness (Shore A) and compression set tests also suggest the presence of chain scission reactions.Fil: Nicolás, Javier. Universidad de Valladolid; EspañaFil: Ressia, Jorge Aníbal. 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: Valles, Enrique Marcelo. 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: Merino, Juan Carlos. Universidad de Valladolid; EspañaFil: Pastor, José María. Universidad de Valladolid; EspañaWiley VCH Verlag2004-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/97529Nicolás, Javier; Ressia, Jorge Aníbal; Valles, Enrique Marcelo; Merino, Juan Carlos; Pastor, José María; Characterization of metallocene Epdm terpolymers with high diene and propylene content crosslinked by dicumyl peroxide and β-radiation; Wiley VCH Verlag; Macromolecular Chemistry And Physics; 205; 15; 10-2004; 2080-20881022-1352CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1002/macp.200400166info:eu-repo/semantics/altIdentifier/doi/10.1002/macp.200400166info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:01:07Zoai:ri.conicet.gov.ar:11336/97529instacron: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 11:01:08.257CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Characterization of metallocene Epdm terpolymers with high diene and propylene content crosslinked by dicumyl peroxide and β-radiation
title Characterization of metallocene Epdm terpolymers with high diene and propylene content crosslinked by dicumyl peroxide and β-radiation
spellingShingle Characterization of metallocene Epdm terpolymers with high diene and propylene content crosslinked by dicumyl peroxide and β-radiation
Nicolás, Javier
BETA-RADIATION
CROSSLINKING
EPDM
METALLOCENE CATALYSTS
PEROXIDE
title_short Characterization of metallocene Epdm terpolymers with high diene and propylene content crosslinked by dicumyl peroxide and β-radiation
title_full Characterization of metallocene Epdm terpolymers with high diene and propylene content crosslinked by dicumyl peroxide and β-radiation
title_fullStr Characterization of metallocene Epdm terpolymers with high diene and propylene content crosslinked by dicumyl peroxide and β-radiation
title_full_unstemmed Characterization of metallocene Epdm terpolymers with high diene and propylene content crosslinked by dicumyl peroxide and β-radiation
title_sort Characterization of metallocene Epdm terpolymers with high diene and propylene content crosslinked by dicumyl peroxide and β-radiation
dc.creator.none.fl_str_mv Nicolás, Javier
Ressia, Jorge Aníbal
Valles, Enrique Marcelo
Merino, Juan Carlos
Pastor, José María
author Nicolás, Javier
author_facet Nicolás, Javier
Ressia, Jorge Aníbal
Valles, Enrique Marcelo
Merino, Juan Carlos
Pastor, José María
author_role author
author2 Ressia, Jorge Aníbal
Valles, Enrique Marcelo
Merino, Juan Carlos
Pastor, José María
author2_role author
author
author
author
dc.subject.none.fl_str_mv BETA-RADIATION
CROSSLINKING
EPDM
METALLOCENE CATALYSTS
PEROXIDE
topic BETA-RADIATION
CROSSLINKING
EPDM
METALLOCENE CATALYSTS
PEROXIDE
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Two metallocene EPDMs with the same weight fraction of ethylene but differing in diene content were crosslinked, either by dicumyl peroxide (DCP) or β-radiation. The effect of different diene and propylene content on the molecular structure and the mechanical properties once the materials were crosslinked was studied. The final gel content was very high due to the large level of unsaturations. The crosslinking process was monitored by FTIR spectroscopy by following the decay of unsaturations and the variation of the carbonyl groups that are related to the oxidation grade. It was found that β-radiation crosslinked samples exhibited a lower oxidation grade than those crosslinked by DCP. An oscillant disc rheometer was employed to follow the evolution of the rheological properties, the scorch time, and the time corresponding to full cure during the crosslinking reaction with DCP. In addition, in order to characterize the state of cure we have studied the rheological properties in shear employing a dynamic parallel plate geometry. These results were correlated with those obtained from the molecular characterization of the soluble fraction by size exclusion chromatography. The experiments indicate that, at low irradiation doses, there is a high rate of chain scission reactions that cause an important decrease in storage modulus. Whereas, at high irradiation doses the rate of chain scission reactions diminishes, thus the storage modulus increases but it still remains at lower levels than those corresponding to the original terpolymers. The tensile properties, hardness (Shore A) and compression set tests also suggest the presence of chain scission reactions.
Fil: Nicolás, Javier. Universidad de Valladolid; España
Fil: Ressia, Jorge Aníbal. 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: Valles, Enrique Marcelo. 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: Merino, Juan Carlos. Universidad de Valladolid; España
Fil: Pastor, José María. Universidad de Valladolid; España
description Two metallocene EPDMs with the same weight fraction of ethylene but differing in diene content were crosslinked, either by dicumyl peroxide (DCP) or β-radiation. The effect of different diene and propylene content on the molecular structure and the mechanical properties once the materials were crosslinked was studied. The final gel content was very high due to the large level of unsaturations. The crosslinking process was monitored by FTIR spectroscopy by following the decay of unsaturations and the variation of the carbonyl groups that are related to the oxidation grade. It was found that β-radiation crosslinked samples exhibited a lower oxidation grade than those crosslinked by DCP. An oscillant disc rheometer was employed to follow the evolution of the rheological properties, the scorch time, and the time corresponding to full cure during the crosslinking reaction with DCP. In addition, in order to characterize the state of cure we have studied the rheological properties in shear employing a dynamic parallel plate geometry. These results were correlated with those obtained from the molecular characterization of the soluble fraction by size exclusion chromatography. The experiments indicate that, at low irradiation doses, there is a high rate of chain scission reactions that cause an important decrease in storage modulus. Whereas, at high irradiation doses the rate of chain scission reactions diminishes, thus the storage modulus increases but it still remains at lower levels than those corresponding to the original terpolymers. The tensile properties, hardness (Shore A) and compression set tests also suggest the presence of chain scission reactions.
publishDate 2004
dc.date.none.fl_str_mv 2004-10
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/11336/97529
Nicolás, Javier; Ressia, Jorge Aníbal; Valles, Enrique Marcelo; Merino, Juan Carlos; Pastor, José María; Characterization of metallocene Epdm terpolymers with high diene and propylene content crosslinked by dicumyl peroxide and β-radiation; Wiley VCH Verlag; Macromolecular Chemistry And Physics; 205; 15; 10-2004; 2080-2088
1022-1352
CONICET Digital
CONICET
url http://hdl.handle.net/11336/97529
identifier_str_mv Nicolás, Javier; Ressia, Jorge Aníbal; Valles, Enrique Marcelo; Merino, Juan Carlos; Pastor, José María; Characterization of metallocene Epdm terpolymers with high diene and propylene content crosslinked by dicumyl peroxide and β-radiation; Wiley VCH Verlag; Macromolecular Chemistry And Physics; 205; 15; 10-2004; 2080-2088
1022-1352
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://onlinelibrary.wiley.com/doi/abs/10.1002/macp.200400166
info:eu-repo/semantics/altIdentifier/doi/10.1002/macp.200400166
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 Wiley VCH Verlag
publisher.none.fl_str_mv Wiley VCH Verlag
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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