Instability of Styrene/Polystyrene/Polybutadiene/Polystyrene-beta-Polybutadiene Emulsions that Emulate Styrene Polymerization in the Presence of Polybutadiene

Autores
Velasquez, Eliezer; Oliva, Haydée; Muller, Alejandro; Lopez, Juan; Vega, Jorge Ruben; Meira, Gregorio Raul; Wambach, Mona
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
This paper investigates the room-temperature demixing of oil-in-oil emulsions containing styrene (St), polybutadiene (PB), a St-butadiene star block copolymer (BC), and 2 polystyrene (PS) samples of different molecular weights; and is a contribution towards a better understanding of the stability/ instability of the reaction mixture in a bulk high impact polystyrene (HIPS) process close to the phase inversion. Twelve bulk prepolymerizations of St in the presence of PB were emulated, at 10, 15, and 20% conversion; and with constant grafting efficiencies. All the blends contained 6% in weight of butadiene units. After stirring the blends for 24 h, the decantation demixing process was monitored along 30 days, with daily measurement of the interface levels after appearance of a clear interface. All final samples exhibited an upper (PB-rich) phase and a lower (PS-rich) phase. Additionally, the experiments with the high molar mass PS and high grafting efficiencies also exhibited a third intermediate BC-rich phase. For some of the isolated phases, their unswollen morphologies were observed by TEM, and the St partition coefficient was gravimetrically determined. All the isolated phases exhibited macrophase separation into homopolymer- and copolymer-rich macrodomains, with lamellar microdomains in the copolymer-rich macrodomains. The BC showed a greater affinity towards the PS-rich phase. The separation of an independent BC-rich phase in the blends containing the high molar mass PS and at high grafting efficiencies, modifies the idea of the graft- or block copolymer molecules located at the interface of large PS-rich and PB-rich phases.
Fil: Velasquez, Eliezer. Universidad del Zulia; Venezuela
Fil: Oliva, Haydée. Universidad del Zulia; Venezuela
Fil: Muller, Alejandro. Universidad Simón Bolívar; Venezuela
Fil: Lopez, Juan. Universidad Simón Bolívar; Venezuela
Fil: Vega, Jorge Ruben. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina
Fil: Meira, Gregorio Raul. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina
Fil: Wambach, Mona. Institut für Polymerforschung; Alemania
Materia
Polystyrene
Morphology
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:11336/8772
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/8772
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Instability of Styrene/Polystyrene/Polybutadiene/Polystyrene-beta-Polybutadiene Emulsions that Emulate Styrene Polymerization in the Presence of PolybutadieneVelasquez, EliezerOliva, HaydéeMuller, AlejandroLopez, JuanVega, Jorge RubenMeira, Gregorio RaulWambach, MonaPolystyreneMorphologyBlendshttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2This paper investigates the room-temperature demixing of oil-in-oil emulsions containing styrene (St), polybutadiene (PB), a St-butadiene star block copolymer (BC), and 2 polystyrene (PS) samples of different molecular weights; and is a contribution towards a better understanding of the stability/ instability of the reaction mixture in a bulk high impact polystyrene (HIPS) process close to the phase inversion. Twelve bulk prepolymerizations of St in the presence of PB were emulated, at 10, 15, and 20% conversion; and with constant grafting efficiencies. All the blends contained 6% in weight of butadiene units. After stirring the blends for 24 h, the decantation demixing process was monitored along 30 days, with daily measurement of the interface levels after appearance of a clear interface. All final samples exhibited an upper (PB-rich) phase and a lower (PS-rich) phase. Additionally, the experiments with the high molar mass PS and high grafting efficiencies also exhibited a third intermediate BC-rich phase. For some of the isolated phases, their unswollen morphologies were observed by TEM, and the St partition coefficient was gravimetrically determined. All the isolated phases exhibited macrophase separation into homopolymer- and copolymer-rich macrodomains, with lamellar microdomains in the copolymer-rich macrodomains. The BC showed a greater affinity towards the PS-rich phase. The separation of an independent BC-rich phase in the blends containing the high molar mass PS and at high grafting efficiencies, modifies the idea of the graft- or block copolymer molecules located at the interface of large PS-rich and PB-rich phases.Fil: Velasquez, Eliezer. Universidad del Zulia; VenezuelaFil: Oliva, Haydée. Universidad del Zulia; VenezuelaFil: Muller, Alejandro. Universidad Simón Bolívar; VenezuelaFil: Lopez, Juan. Universidad Simón Bolívar; VenezuelaFil: Vega, Jorge Ruben. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); ArgentinaFil: Meira, Gregorio Raul. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); ArgentinaFil: Wambach, Mona. Institut für Polymerforschung; AlemaniaWiley2013-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/8772Velasquez, Eliezer; Oliva, Haydée; Muller, Alejandro; Lopez, Juan; Vega, Jorge Ruben; et al.; Instability of Styrene/Polystyrene/Polybutadiene/Polystyrene-beta-Polybutadiene Emulsions that Emulate Styrene Polymerization in the Presence of Polybutadiene; Wiley; Polymer Engineering And Science; 53; 9; 1-2013; 1886-19000032-3888enginfo:eu-repo/semantics/altIdentifier/doi/10.1002/pen.23450info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/pen.23450/abstractinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:03:31Zoai:ri.conicet.gov.ar:11336/8772instacron: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 10:03:31.835CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Instability of Styrene/Polystyrene/Polybutadiene/Polystyrene-beta-Polybutadiene Emulsions that Emulate Styrene Polymerization in the Presence of Polybutadiene
title Instability of Styrene/Polystyrene/Polybutadiene/Polystyrene-beta-Polybutadiene Emulsions that Emulate Styrene Polymerization in the Presence of Polybutadiene
spellingShingle Instability of Styrene/Polystyrene/Polybutadiene/Polystyrene-beta-Polybutadiene Emulsions that Emulate Styrene Polymerization in the Presence of Polybutadiene
Velasquez, Eliezer
Polystyrene
Morphology
Blends
title_short Instability of Styrene/Polystyrene/Polybutadiene/Polystyrene-beta-Polybutadiene Emulsions that Emulate Styrene Polymerization in the Presence of Polybutadiene
title_full Instability of Styrene/Polystyrene/Polybutadiene/Polystyrene-beta-Polybutadiene Emulsions that Emulate Styrene Polymerization in the Presence of Polybutadiene
title_fullStr Instability of Styrene/Polystyrene/Polybutadiene/Polystyrene-beta-Polybutadiene Emulsions that Emulate Styrene Polymerization in the Presence of Polybutadiene
title_full_unstemmed Instability of Styrene/Polystyrene/Polybutadiene/Polystyrene-beta-Polybutadiene Emulsions that Emulate Styrene Polymerization in the Presence of Polybutadiene
title_sort Instability of Styrene/Polystyrene/Polybutadiene/Polystyrene-beta-Polybutadiene Emulsions that Emulate Styrene Polymerization in the Presence of Polybutadiene
dc.creator.none.fl_str_mv Velasquez, Eliezer
Oliva, Haydée
Muller, Alejandro
Lopez, Juan
Vega, Jorge Ruben
Meira, Gregorio Raul
Wambach, Mona
author Velasquez, Eliezer
author_facet Velasquez, Eliezer
Oliva, Haydée
Muller, Alejandro
Lopez, Juan
Vega, Jorge Ruben
Meira, Gregorio Raul
Wambach, Mona
author_role author
author2 Oliva, Haydée
Muller, Alejandro
Lopez, Juan
Vega, Jorge Ruben
Meira, Gregorio Raul
Wambach, Mona
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Polystyrene
Morphology
Blends
topic Polystyrene
Morphology
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 This paper investigates the room-temperature demixing of oil-in-oil emulsions containing styrene (St), polybutadiene (PB), a St-butadiene star block copolymer (BC), and 2 polystyrene (PS) samples of different molecular weights; and is a contribution towards a better understanding of the stability/ instability of the reaction mixture in a bulk high impact polystyrene (HIPS) process close to the phase inversion. Twelve bulk prepolymerizations of St in the presence of PB were emulated, at 10, 15, and 20% conversion; and with constant grafting efficiencies. All the blends contained 6% in weight of butadiene units. After stirring the blends for 24 h, the decantation demixing process was monitored along 30 days, with daily measurement of the interface levels after appearance of a clear interface. All final samples exhibited an upper (PB-rich) phase and a lower (PS-rich) phase. Additionally, the experiments with the high molar mass PS and high grafting efficiencies also exhibited a third intermediate BC-rich phase. For some of the isolated phases, their unswollen morphologies were observed by TEM, and the St partition coefficient was gravimetrically determined. All the isolated phases exhibited macrophase separation into homopolymer- and copolymer-rich macrodomains, with lamellar microdomains in the copolymer-rich macrodomains. The BC showed a greater affinity towards the PS-rich phase. The separation of an independent BC-rich phase in the blends containing the high molar mass PS and at high grafting efficiencies, modifies the idea of the graft- or block copolymer molecules located at the interface of large PS-rich and PB-rich phases.
Fil: Velasquez, Eliezer. Universidad del Zulia; Venezuela
Fil: Oliva, Haydée. Universidad del Zulia; Venezuela
Fil: Muller, Alejandro. Universidad Simón Bolívar; Venezuela
Fil: Lopez, Juan. Universidad Simón Bolívar; Venezuela
Fil: Vega, Jorge Ruben. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina
Fil: Meira, Gregorio Raul. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina
Fil: Wambach, Mona. Institut für Polymerforschung; Alemania
description This paper investigates the room-temperature demixing of oil-in-oil emulsions containing styrene (St), polybutadiene (PB), a St-butadiene star block copolymer (BC), and 2 polystyrene (PS) samples of different molecular weights; and is a contribution towards a better understanding of the stability/ instability of the reaction mixture in a bulk high impact polystyrene (HIPS) process close to the phase inversion. Twelve bulk prepolymerizations of St in the presence of PB were emulated, at 10, 15, and 20% conversion; and with constant grafting efficiencies. All the blends contained 6% in weight of butadiene units. After stirring the blends for 24 h, the decantation demixing process was monitored along 30 days, with daily measurement of the interface levels after appearance of a clear interface. All final samples exhibited an upper (PB-rich) phase and a lower (PS-rich) phase. Additionally, the experiments with the high molar mass PS and high grafting efficiencies also exhibited a third intermediate BC-rich phase. For some of the isolated phases, their unswollen morphologies were observed by TEM, and the St partition coefficient was gravimetrically determined. All the isolated phases exhibited macrophase separation into homopolymer- and copolymer-rich macrodomains, with lamellar microdomains in the copolymer-rich macrodomains. The BC showed a greater affinity towards the PS-rich phase. The separation of an independent BC-rich phase in the blends containing the high molar mass PS and at high grafting efficiencies, modifies the idea of the graft- or block copolymer molecules located at the interface of large PS-rich and PB-rich phases.
publishDate 2013
dc.date.none.fl_str_mv 2013-01
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/11336/8772
Velasquez, Eliezer; Oliva, Haydée; Muller, Alejandro; Lopez, Juan; Vega, Jorge Ruben; et al.; Instability of Styrene/Polystyrene/Polybutadiene/Polystyrene-beta-Polybutadiene Emulsions that Emulate Styrene Polymerization in the Presence of Polybutadiene; Wiley; Polymer Engineering And Science; 53; 9; 1-2013; 1886-1900
0032-3888
url http://hdl.handle.net/11336/8772
identifier_str_mv Velasquez, Eliezer; Oliva, Haydée; Muller, Alejandro; Lopez, Juan; Vega, Jorge Ruben; et al.; Instability of Styrene/Polystyrene/Polybutadiene/Polystyrene-beta-Polybutadiene Emulsions that Emulate Styrene Polymerization in the Presence of Polybutadiene; Wiley; Polymer Engineering And Science; 53; 9; 1-2013; 1886-1900
0032-3888
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1002/pen.23450
info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/pen.23450/abstract
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
publisher.none.fl_str_mv Wiley
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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