Thermoplastic blend demixing by a high-pressure, high-temperature process

Autores
Barbosa, Silvia Elena; Diaz, Monica Fatima; Mabe, Guillermo Domingo; Brignole, Esteban Alberto; Capiati, Numa Jose
Año de publicación
2005
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The analysis of a thermoplastic polymer blend requires a precise separation of the blend components, which is usually performed by selective solvent extraction. However, when the components are high-molecular-weight polymers, a complete separation is very difficult. The use of fluids in near critical and supercritical conditions becomes a promising alternative to reach a much more precise separation. In this work, a method to separate reactive and physical blends from high-molecular-weight commercial polymers is proposed. Polyethylene (PE)/polystyrene (PS) blends were separated into their components with n-propane, n-pentane, and n-heptane at near critical and supercritical conditions. The selectivity of each solvent was experimentally studied over a wide range of temperatures for assessing the processing windows for the separation of pure components. The entire PE phase was solubilized by n-pentane and n-heptane at similar temperatures, whereas propane at supercritical conditions could not dissolve the fraction of high-molecular-weight PE. The influence of the blend morphology and composition on the efficiency of the polymer separation was studied. In reactive blends, the in situ copolymer formed was solubilized with the PE phase by chemical affinity. The method proposed for blend separation is easy, rapid, and selective and seems to be a promising tool for blend separation, particularly for reactive blends, for which the isolation of the copolymer is essential for characterization.
Fil: Barbosa, Silvia Elena. 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: Diaz, Monica Fatima. 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: Mabe, Guillermo Domingo. 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: Brignole, Esteban Alberto. 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: Capiati, Numa Jose. 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 Extraction
Blends
Graft Copolymers
High-Pressure Polymer Extraction
Separation Techniques
Thermoplastic Blend Separation
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:11336/78987
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Thermoplastic blend demixing by a high-pressure, high-temperature processBarbosa, Silvia ElenaDiaz, Monica FatimaMabe, Guillermo DomingoBrignole, Esteban AlbertoCapiati, Numa JoseBlend ExtractionBlendsGraft CopolymersHigh-Pressure Polymer ExtractionSeparation TechniquesThermoplastic Blend Separationhttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2The analysis of a thermoplastic polymer blend requires a precise separation of the blend components, which is usually performed by selective solvent extraction. However, when the components are high-molecular-weight polymers, a complete separation is very difficult. The use of fluids in near critical and supercritical conditions becomes a promising alternative to reach a much more precise separation. In this work, a method to separate reactive and physical blends from high-molecular-weight commercial polymers is proposed. Polyethylene (PE)/polystyrene (PS) blends were separated into their components with n-propane, n-pentane, and n-heptane at near critical and supercritical conditions. The selectivity of each solvent was experimentally studied over a wide range of temperatures for assessing the processing windows for the separation of pure components. The entire PE phase was solubilized by n-pentane and n-heptane at similar temperatures, whereas propane at supercritical conditions could not dissolve the fraction of high-molecular-weight PE. The influence of the blend morphology and composition on the efficiency of the polymer separation was studied. In reactive blends, the in situ copolymer formed was solubilized with the PE phase by chemical affinity. The method proposed for blend separation is easy, rapid, and selective and seems to be a promising tool for blend separation, particularly for reactive blends, for which the isolation of the copolymer is essential for characterization.Fil: Barbosa, Silvia Elena. 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: Diaz, Monica Fatima. 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: Mabe, Guillermo Domingo. 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: Brignole, Esteban Alberto. 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: Capiati, Numa Jose. 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 Inc2005-09-14info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/78987Barbosa, Silvia Elena; Diaz, Monica Fatima; Mabe, Guillermo Domingo; Brignole, Esteban Alberto; Capiati, Numa Jose; Thermoplastic blend demixing by a high-pressure, high-temperature process; John Wiley & Sons Inc; Journal of Polymer Science Part B: Polymer Physics; 43; 17; 14-9-2005; 2361-23690887-6266CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1002/polb.20520info:eu-repo/semantics/altIdentifier/doi/10.1002/polb.20520info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:36:55Zoai:ri.conicet.gov.ar:11336/78987instacron: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:34982025-10-15 14:36:56.137CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Thermoplastic blend demixing by a high-pressure, high-temperature process
title Thermoplastic blend demixing by a high-pressure, high-temperature process
spellingShingle Thermoplastic blend demixing by a high-pressure, high-temperature process
Barbosa, Silvia Elena
Blend Extraction
Blends
Graft Copolymers
High-Pressure Polymer Extraction
Separation Techniques
Thermoplastic Blend Separation
title_short Thermoplastic blend demixing by a high-pressure, high-temperature process
title_full Thermoplastic blend demixing by a high-pressure, high-temperature process
title_fullStr Thermoplastic blend demixing by a high-pressure, high-temperature process
title_full_unstemmed Thermoplastic blend demixing by a high-pressure, high-temperature process
title_sort Thermoplastic blend demixing by a high-pressure, high-temperature process
dc.creator.none.fl_str_mv Barbosa, Silvia Elena
Diaz, Monica Fatima
Mabe, Guillermo Domingo
Brignole, Esteban Alberto
Capiati, Numa Jose
author Barbosa, Silvia Elena
author_facet Barbosa, Silvia Elena
Diaz, Monica Fatima
Mabe, Guillermo Domingo
Brignole, Esteban Alberto
Capiati, Numa Jose
author_role author
author2 Diaz, Monica Fatima
Mabe, Guillermo Domingo
Brignole, Esteban Alberto
Capiati, Numa Jose
author2_role author
author
author
author
dc.subject.none.fl_str_mv Blend Extraction
Blends
Graft Copolymers
High-Pressure Polymer Extraction
Separation Techniques
Thermoplastic Blend Separation
topic Blend Extraction
Blends
Graft Copolymers
High-Pressure Polymer Extraction
Separation Techniques
Thermoplastic Blend Separation
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 analysis of a thermoplastic polymer blend requires a precise separation of the blend components, which is usually performed by selective solvent extraction. However, when the components are high-molecular-weight polymers, a complete separation is very difficult. The use of fluids in near critical and supercritical conditions becomes a promising alternative to reach a much more precise separation. In this work, a method to separate reactive and physical blends from high-molecular-weight commercial polymers is proposed. Polyethylene (PE)/polystyrene (PS) blends were separated into their components with n-propane, n-pentane, and n-heptane at near critical and supercritical conditions. The selectivity of each solvent was experimentally studied over a wide range of temperatures for assessing the processing windows for the separation of pure components. The entire PE phase was solubilized by n-pentane and n-heptane at similar temperatures, whereas propane at supercritical conditions could not dissolve the fraction of high-molecular-weight PE. The influence of the blend morphology and composition on the efficiency of the polymer separation was studied. In reactive blends, the in situ copolymer formed was solubilized with the PE phase by chemical affinity. The method proposed for blend separation is easy, rapid, and selective and seems to be a promising tool for blend separation, particularly for reactive blends, for which the isolation of the copolymer is essential for characterization.
Fil: Barbosa, Silvia Elena. 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: Diaz, Monica Fatima. 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: Mabe, Guillermo Domingo. 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: Brignole, Esteban Alberto. 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: Capiati, Numa Jose. 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 analysis of a thermoplastic polymer blend requires a precise separation of the blend components, which is usually performed by selective solvent extraction. However, when the components are high-molecular-weight polymers, a complete separation is very difficult. The use of fluids in near critical and supercritical conditions becomes a promising alternative to reach a much more precise separation. In this work, a method to separate reactive and physical blends from high-molecular-weight commercial polymers is proposed. Polyethylene (PE)/polystyrene (PS) blends were separated into their components with n-propane, n-pentane, and n-heptane at near critical and supercritical conditions. The selectivity of each solvent was experimentally studied over a wide range of temperatures for assessing the processing windows for the separation of pure components. The entire PE phase was solubilized by n-pentane and n-heptane at similar temperatures, whereas propane at supercritical conditions could not dissolve the fraction of high-molecular-weight PE. The influence of the blend morphology and composition on the efficiency of the polymer separation was studied. In reactive blends, the in situ copolymer formed was solubilized with the PE phase by chemical affinity. The method proposed for blend separation is easy, rapid, and selective and seems to be a promising tool for blend separation, particularly for reactive blends, for which the isolation of the copolymer is essential for characterization.
publishDate 2005
dc.date.none.fl_str_mv 2005-09-14
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/11336/78987
Barbosa, Silvia Elena; Diaz, Monica Fatima; Mabe, Guillermo Domingo; Brignole, Esteban Alberto; Capiati, Numa Jose; Thermoplastic blend demixing by a high-pressure, high-temperature process; John Wiley & Sons Inc; Journal of Polymer Science Part B: Polymer Physics; 43; 17; 14-9-2005; 2361-2369
0887-6266
CONICET Digital
CONICET
url http://hdl.handle.net/11336/78987
identifier_str_mv Barbosa, Silvia Elena; Diaz, Monica Fatima; Mabe, Guillermo Domingo; Brignole, Esteban Alberto; Capiati, Numa Jose; Thermoplastic blend demixing by a high-pressure, high-temperature process; John Wiley & Sons Inc; Journal of Polymer Science Part B: Polymer Physics; 43; 17; 14-9-2005; 2361-2369
0887-6266
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/polb.20520
info:eu-repo/semantics/altIdentifier/doi/10.1002/polb.20520
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
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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