Linear viscoelasticity of blends of polybutadiene and highly hydrogenated polybutadiene

Autores
Cassano, Guillermo A.; Valles, Enrique Marcelo; Quinzani, Lidia Maria
Año de publicación
2000
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The linear viscoelastic behavior of a series of partially hydrogenated polybutadienes (PHPB) obtained by catalytic hydrogenation of an almost monodisperse polybutadiene (PB) was studied experimentally at temperatures above 110°C. The molecular characterization of the polymers used in this study showed that the catalytic hydrogenation of PB produces materials with a bimodal distribution of polymer species for global conversions lower than approximately 90%. All the PHPBs, even the less hydrogenated, are a mixture of a highly hydrogenated PB (with approximately 89% saturation) and unreacted PB. The rheological behavior of the fluids was studied measuring the elastic and viscous moduli at different temperatures in small-amplitude oscillatory shear flow. The two-phase polymer blends show thermorheological complex behavior and an increase in elasticity at low frequencies which may be associated with long relaxation time processes. The dynamic moduli of the pure components in the terminal region is modeled using a single relaxation time while the blends are described by a minimum of three relaxation modes. The two smaller relaxation times correspond to the relaxation of the blend components while the largest comes from the geometric relaxation of the shape of the interface. The zero-shear-rate viscosity of the PHPBs shows a positive deviation relative to log-additivity rule. But, when the predicted contribution of the interface is subtracted, the resulting zero-shear-rate viscosity as a function of the concentration follows this rule. © 2000 The Society of Rheology.
Fil: Cassano, Guillermo A.. 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: 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
Polybutadiene
Hydrogenation
Linear Viscoelasticity
Blends
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:11336/37651
Acceder
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spelling Linear viscoelasticity of blends of polybutadiene and highly hydrogenated polybutadieneCassano, Guillermo A.Valles, Enrique MarceloQuinzani, Lidia MariaPolybutadieneHydrogenationLinear ViscoelasticityBlendshttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2The linear viscoelastic behavior of a series of partially hydrogenated polybutadienes (PHPB) obtained by catalytic hydrogenation of an almost monodisperse polybutadiene (PB) was studied experimentally at temperatures above 110°C. The molecular characterization of the polymers used in this study showed that the catalytic hydrogenation of PB produces materials with a bimodal distribution of polymer species for global conversions lower than approximately 90%. All the PHPBs, even the less hydrogenated, are a mixture of a highly hydrogenated PB (with approximately 89% saturation) and unreacted PB. The rheological behavior of the fluids was studied measuring the elastic and viscous moduli at different temperatures in small-amplitude oscillatory shear flow. The two-phase polymer blends show thermorheological complex behavior and an increase in elasticity at low frequencies which may be associated with long relaxation time processes. The dynamic moduli of the pure components in the terminal region is modeled using a single relaxation time while the blends are described by a minimum of three relaxation modes. The two smaller relaxation times correspond to the relaxation of the blend components while the largest comes from the geometric relaxation of the shape of the interface. The zero-shear-rate viscosity of the PHPBs shows a positive deviation relative to log-additivity rule. But, when the predicted contribution of the interface is subtracted, the resulting zero-shear-rate viscosity as a function of the concentration follows this rule. © 2000 The Society of Rheology.Fil: Cassano, Guillermo A.. 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: 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; ArgentinaJournal Rheology Amer Inst Physics2000-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/37651Cassano, Guillermo A.; Valles, Enrique Marcelo; Quinzani, Lidia Maria; Linear viscoelasticity of blends of polybutadiene and highly hydrogenated polybutadiene; Journal Rheology Amer Inst Physics; Journal of Rheology; 44; 1; 1-2000; 47-630148-6055CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1122/1.551077info:eu-repo/semantics/altIdentifier/url/http://sor.scitation.org/doi/abs/10.1122/1.551077info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:13:22Zoai:ri.conicet.gov.ar:11336/37651instacron: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 10:13:23.192CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Linear viscoelasticity of blends of polybutadiene and highly hydrogenated polybutadiene
title Linear viscoelasticity of blends of polybutadiene and highly hydrogenated polybutadiene
spellingShingle Linear viscoelasticity of blends of polybutadiene and highly hydrogenated polybutadiene
Cassano, Guillermo A.
Polybutadiene
Hydrogenation
Linear Viscoelasticity
Blends
title_short Linear viscoelasticity of blends of polybutadiene and highly hydrogenated polybutadiene
title_full Linear viscoelasticity of blends of polybutadiene and highly hydrogenated polybutadiene
title_fullStr Linear viscoelasticity of blends of polybutadiene and highly hydrogenated polybutadiene
title_full_unstemmed Linear viscoelasticity of blends of polybutadiene and highly hydrogenated polybutadiene
title_sort Linear viscoelasticity of blends of polybutadiene and highly hydrogenated polybutadiene
dc.creator.none.fl_str_mv Cassano, Guillermo A.
Valles, Enrique Marcelo
Quinzani, Lidia Maria
author Cassano, Guillermo A.
author_facet Cassano, Guillermo A.
Valles, Enrique Marcelo
Quinzani, Lidia Maria
author_role author
author2 Valles, Enrique Marcelo
Quinzani, Lidia Maria
author2_role author
author
dc.subject.none.fl_str_mv Polybutadiene
Hydrogenation
Linear Viscoelasticity
Blends
topic Polybutadiene
Hydrogenation
Linear Viscoelasticity
Blends
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv The linear viscoelastic behavior of a series of partially hydrogenated polybutadienes (PHPB) obtained by catalytic hydrogenation of an almost monodisperse polybutadiene (PB) was studied experimentally at temperatures above 110°C. The molecular characterization of the polymers used in this study showed that the catalytic hydrogenation of PB produces materials with a bimodal distribution of polymer species for global conversions lower than approximately 90%. All the PHPBs, even the less hydrogenated, are a mixture of a highly hydrogenated PB (with approximately 89% saturation) and unreacted PB. The rheological behavior of the fluids was studied measuring the elastic and viscous moduli at different temperatures in small-amplitude oscillatory shear flow. The two-phase polymer blends show thermorheological complex behavior and an increase in elasticity at low frequencies which may be associated with long relaxation time processes. The dynamic moduli of the pure components in the terminal region is modeled using a single relaxation time while the blends are described by a minimum of three relaxation modes. The two smaller relaxation times correspond to the relaxation of the blend components while the largest comes from the geometric relaxation of the shape of the interface. The zero-shear-rate viscosity of the PHPBs shows a positive deviation relative to log-additivity rule. But, when the predicted contribution of the interface is subtracted, the resulting zero-shear-rate viscosity as a function of the concentration follows this rule. © 2000 The Society of Rheology.
Fil: Cassano, Guillermo A.. 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: 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 linear viscoelastic behavior of a series of partially hydrogenated polybutadienes (PHPB) obtained by catalytic hydrogenation of an almost monodisperse polybutadiene (PB) was studied experimentally at temperatures above 110°C. The molecular characterization of the polymers used in this study showed that the catalytic hydrogenation of PB produces materials with a bimodal distribution of polymer species for global conversions lower than approximately 90%. All the PHPBs, even the less hydrogenated, are a mixture of a highly hydrogenated PB (with approximately 89% saturation) and unreacted PB. The rheological behavior of the fluids was studied measuring the elastic and viscous moduli at different temperatures in small-amplitude oscillatory shear flow. The two-phase polymer blends show thermorheological complex behavior and an increase in elasticity at low frequencies which may be associated with long relaxation time processes. The dynamic moduli of the pure components in the terminal region is modeled using a single relaxation time while the blends are described by a minimum of three relaxation modes. The two smaller relaxation times correspond to the relaxation of the blend components while the largest comes from the geometric relaxation of the shape of the interface. The zero-shear-rate viscosity of the PHPBs shows a positive deviation relative to log-additivity rule. But, when the predicted contribution of the interface is subtracted, the resulting zero-shear-rate viscosity as a function of the concentration follows this rule. © 2000 The Society of Rheology.
publishDate 2000
dc.date.none.fl_str_mv 2000-01
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/11336/37651
Cassano, Guillermo A.; Valles, Enrique Marcelo; Quinzani, Lidia Maria; Linear viscoelasticity of blends of polybutadiene and highly hydrogenated polybutadiene; Journal Rheology Amer Inst Physics; Journal of Rheology; 44; 1; 1-2000; 47-63
0148-6055
CONICET Digital
CONICET
url http://hdl.handle.net/11336/37651
identifier_str_mv Cassano, Guillermo A.; Valles, Enrique Marcelo; Quinzani, Lidia Maria; Linear viscoelasticity of blends of polybutadiene and highly hydrogenated polybutadiene; Journal Rheology Amer Inst Physics; Journal of Rheology; 44; 1; 1-2000; 47-63
0148-6055
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1122/1.551077
info:eu-repo/semantics/altIdentifier/url/http://sor.scitation.org/doi/abs/10.1122/1.551077
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 Journal Rheology Amer Inst Physics
publisher.none.fl_str_mv Journal Rheology Amer Inst Physics
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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