Effect of melt annealing on the phase structure and rheological behavior of propylene-ethylene copolymers

Autores
de la Torre, Vanesa Lorena; Rodriguez Fris, Jorge Ariel; Failla, Marcelo Daniel; Quinzani, Lidia Maria
Año de publicación
2007
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The morphological and rheological properties of a commercial propylene-ethylene copolymer (PEC) and a series of blends with different concentrations of poly (ethylene-co-propylene) are investigated. The blends are prepared mixing PEC with fractions obtained from it by solvent extraction. The phase structure of samples exposed to different thermal and mechanical histories was analyzed using scanning electron microscopy. The linear viscoelastic properties of the molten polymers were measured using different test sequences that include dynamic frequency and time sweeps. The phase structure of most blends changes dramatically with time when the polymers are kept in the molten state due to the coalescence of the domains. For example, the initial morphology of PEC which presents domains of ∼1 μm diameter changes to regions of more than 10 μm of average diameter after 90 min at 178 C at rest. Coincidentally, the dynamic moduli of the blends change during annealing reaching values that depend on the mechanical history. For example, the elastic modulus of PEC increases ∼32% during a dynamic time sweep of 45 min using a frequency of 0.1 s-1, while it decreases ∼18% when a frequency of 1 s-1 is applied. Moreover, the modulus measured at 0.1 s -1 of samples annealed at rest during 45 min is ∼58% larger than that of the fresh material.
Fil: de la Torre, Vanesa Lorena. 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: Rodriguez Fris, Jorge Ariel. 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: Failla, Marcelo Daniel. 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: Quinzani, Lidia Maria. 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
Blend
Copolymer
Polypropylene
Rheology
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:11336/75871
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/75871
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Effect of melt annealing on the phase structure and rheological behavior of propylene-ethylene copolymersde la Torre, Vanesa LorenaRodriguez Fris, Jorge ArielFailla, Marcelo DanielQuinzani, Lidia MariaBlendCopolymerPolypropyleneRheologyhttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2The morphological and rheological properties of a commercial propylene-ethylene copolymer (PEC) and a series of blends with different concentrations of poly (ethylene-co-propylene) are investigated. The blends are prepared mixing PEC with fractions obtained from it by solvent extraction. The phase structure of samples exposed to different thermal and mechanical histories was analyzed using scanning electron microscopy. The linear viscoelastic properties of the molten polymers were measured using different test sequences that include dynamic frequency and time sweeps. The phase structure of most blends changes dramatically with time when the polymers are kept in the molten state due to the coalescence of the domains. For example, the initial morphology of PEC which presents domains of ∼1 μm diameter changes to regions of more than 10 μm of average diameter after 90 min at 178 C at rest. Coincidentally, the dynamic moduli of the blends change during annealing reaching values that depend on the mechanical history. For example, the elastic modulus of PEC increases ∼32% during a dynamic time sweep of 45 min using a frequency of 0.1 s-1, while it decreases ∼18% when a frequency of 1 s-1 is applied. Moreover, the modulus measured at 0.1 s -1 of samples annealed at rest during 45 min is ∼58% larger than that of the fresh material.Fil: de la Torre, Vanesa Lorena. 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: Rodriguez Fris, Jorge Ariel. 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: Failla, Marcelo Daniel. 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: Quinzani, Lidia Maria. 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; ArgentinaJohn Wiley & Sons Inc2007-06-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/75871de la Torre, Vanesa Lorena; Rodriguez Fris, Jorge Ariel; Failla, Marcelo Daniel; Quinzani, Lidia Maria; Effect of melt annealing on the phase structure and rheological behavior of propylene-ethylene copolymers; John Wiley & Sons Inc; Polymer Engineering and Science; 47; 6; 30-6-2007; 912-9210032-3888CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1002/pen.20775info:eu-repo/semantics/altIdentifier/doi/10.1002/pen.20775info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:05:55Zoai:ri.conicet.gov.ar:11336/75871instacron: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 10:05:55.346CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Effect of melt annealing on the phase structure and rheological behavior of propylene-ethylene copolymers
title Effect of melt annealing on the phase structure and rheological behavior of propylene-ethylene copolymers
spellingShingle Effect of melt annealing on the phase structure and rheological behavior of propylene-ethylene copolymers
de la Torre, Vanesa Lorena
Blend
Copolymer
Polypropylene
Rheology
title_short Effect of melt annealing on the phase structure and rheological behavior of propylene-ethylene copolymers
title_full Effect of melt annealing on the phase structure and rheological behavior of propylene-ethylene copolymers
title_fullStr Effect of melt annealing on the phase structure and rheological behavior of propylene-ethylene copolymers
title_full_unstemmed Effect of melt annealing on the phase structure and rheological behavior of propylene-ethylene copolymers
title_sort Effect of melt annealing on the phase structure and rheological behavior of propylene-ethylene copolymers
dc.creator.none.fl_str_mv de la Torre, Vanesa Lorena
Rodriguez Fris, Jorge Ariel
Failla, Marcelo Daniel
Quinzani, Lidia Maria
author de la Torre, Vanesa Lorena
author_facet de la Torre, Vanesa Lorena
Rodriguez Fris, Jorge Ariel
Failla, Marcelo Daniel
Quinzani, Lidia Maria
author_role author
author2 Rodriguez Fris, Jorge Ariel
Failla, Marcelo Daniel
Quinzani, Lidia Maria
author2_role author
author
author
dc.subject.none.fl_str_mv Blend
Copolymer
Polypropylene
Rheology
topic Blend
Copolymer
Polypropylene
Rheology
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv The morphological and rheological properties of a commercial propylene-ethylene copolymer (PEC) and a series of blends with different concentrations of poly (ethylene-co-propylene) are investigated. The blends are prepared mixing PEC with fractions obtained from it by solvent extraction. The phase structure of samples exposed to different thermal and mechanical histories was analyzed using scanning electron microscopy. The linear viscoelastic properties of the molten polymers were measured using different test sequences that include dynamic frequency and time sweeps. The phase structure of most blends changes dramatically with time when the polymers are kept in the molten state due to the coalescence of the domains. For example, the initial morphology of PEC which presents domains of ∼1 μm diameter changes to regions of more than 10 μm of average diameter after 90 min at 178 C at rest. Coincidentally, the dynamic moduli of the blends change during annealing reaching values that depend on the mechanical history. For example, the elastic modulus of PEC increases ∼32% during a dynamic time sweep of 45 min using a frequency of 0.1 s-1, while it decreases ∼18% when a frequency of 1 s-1 is applied. Moreover, the modulus measured at 0.1 s -1 of samples annealed at rest during 45 min is ∼58% larger than that of the fresh material.
Fil: de la Torre, Vanesa Lorena. 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: Rodriguez Fris, Jorge Ariel. 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: Failla, Marcelo Daniel. 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: Quinzani, Lidia Maria. 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 The morphological and rheological properties of a commercial propylene-ethylene copolymer (PEC) and a series of blends with different concentrations of poly (ethylene-co-propylene) are investigated. The blends are prepared mixing PEC with fractions obtained from it by solvent extraction. The phase structure of samples exposed to different thermal and mechanical histories was analyzed using scanning electron microscopy. The linear viscoelastic properties of the molten polymers were measured using different test sequences that include dynamic frequency and time sweeps. The phase structure of most blends changes dramatically with time when the polymers are kept in the molten state due to the coalescence of the domains. For example, the initial morphology of PEC which presents domains of ∼1 μm diameter changes to regions of more than 10 μm of average diameter after 90 min at 178 C at rest. Coincidentally, the dynamic moduli of the blends change during annealing reaching values that depend on the mechanical history. For example, the elastic modulus of PEC increases ∼32% during a dynamic time sweep of 45 min using a frequency of 0.1 s-1, while it decreases ∼18% when a frequency of 1 s-1 is applied. Moreover, the modulus measured at 0.1 s -1 of samples annealed at rest during 45 min is ∼58% larger than that of the fresh material.
publishDate 2007
dc.date.none.fl_str_mv 2007-06-30
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/11336/75871
de la Torre, Vanesa Lorena; Rodriguez Fris, Jorge Ariel; Failla, Marcelo Daniel; Quinzani, Lidia Maria; Effect of melt annealing on the phase structure and rheological behavior of propylene-ethylene copolymers; John Wiley & Sons Inc; Polymer Engineering and Science; 47; 6; 30-6-2007; 912-921
0032-3888
CONICET Digital
CONICET
url http://hdl.handle.net/11336/75871
identifier_str_mv de la Torre, Vanesa Lorena; Rodriguez Fris, Jorge Ariel; Failla, Marcelo Daniel; Quinzani, Lidia Maria; Effect of melt annealing on the phase structure and rheological behavior of propylene-ethylene copolymers; John Wiley & Sons Inc; Polymer Engineering and Science; 47; 6; 30-6-2007; 912-921
0032-3888
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/pen.20775
info:eu-repo/semantics/altIdentifier/doi/10.1002/pen.20775
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
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv John Wiley & Sons Inc
publisher.none.fl_str_mv John Wiley & Sons Inc
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 13.070432

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