Synthesis and rheological characterization of linear and star-shaped polydimethylsiloxanes

Autores
Ressia, Jorge Aníbal; Villar, Marcelo Armando; Valles, Enrique Marcelo
Año de publicación
2001
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Linear polydimethylsiloxanes (PDMS) and 3‐ and 4‐arm star‐shaped PDMS of narrow molecular weight distribution (MWD) have been synthesized by anionic polymerization. The MWD was obtained by Size Exclusion Chromatography (SEC). Some of the anionically synthesized PDMS showed a relative broad MWD, especially when they were terminated after 3 or more days of reaction. In order to analyze the influence of the extent of reaction on the MWD, a polymerization with sample extractions at different conversions was performed. The MWD of the polymers synthesized at different extents of reaction were studied from a statistical point of view. Linear viscoelastic parameters of the synthesized polymers, such as storage (G′) and loss (G″) moduli, were obtained at different temperatures as functions of frequency (ω). Zero shear rate viscosity (η0) was calculated from the data obtained in the terminal relaxation zone. The molecular weight dependence of η0 shows a good agreement with classical models. Preliminary results obtained from the star polymers suggest an exponential increase in η0 with the number of entanglements per arm.
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: Villar, Marcelo Armando. 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
Materia
Anionic Synthesis
Polydimetylsiloxane
Star-Shaped Polymers
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:11336/40221
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/40221
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Synthesis and rheological characterization of linear and star-shaped polydimethylsiloxanesRessia, Jorge AníbalVillar, Marcelo ArmandoValles, Enrique MarceloAnionic SynthesisPolydimetylsiloxaneStar-Shaped PolymersRheologyhttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2https://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2Linear polydimethylsiloxanes (PDMS) and 3‐ and 4‐arm star‐shaped PDMS of narrow molecular weight distribution (MWD) have been synthesized by anionic polymerization. The MWD was obtained by Size Exclusion Chromatography (SEC). Some of the anionically synthesized PDMS showed a relative broad MWD, especially when they were terminated after 3 or more days of reaction. In order to analyze the influence of the extent of reaction on the MWD, a polymerization with sample extractions at different conversions was performed. The MWD of the polymers synthesized at different extents of reaction were studied from a statistical point of view. Linear viscoelastic parameters of the synthesized polymers, such as storage (G′) and loss (G″) moduli, were obtained at different temperatures as functions of frequency (ω). Zero shear rate viscosity (η0) was calculated from the data obtained in the terminal relaxation zone. The molecular weight dependence of η0 shows a good agreement with classical models. Preliminary results obtained from the star polymers suggest an exponential increase in η0 with the number of entanglements per arm.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; ArgentinaFil: Villar, Marcelo Armando. 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; ArgentinaWiley2001-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/40221Ressia, Jorge Aníbal; Villar, Marcelo Armando; Valles, Enrique Marcelo; Synthesis and rheological characterization of linear and star-shaped polydimethylsiloxanes; Wiley; Macromolecular Symposia; 168; 1; 3-2001; 43-541022-1360CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1002/1521-3900(200103)168:1<43::AID-MASY43>3.0.CO;2-Yinfo:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1002/1521-3900%28200103%29168%3A1%3C43%3A%3AAID-MASY43%3E3.0.CO%3B2-Yinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:17:48Zoai:ri.conicet.gov.ar:11336/40221instacron: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 10:17:49.135CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Synthesis and rheological characterization of linear and star-shaped polydimethylsiloxanes
title Synthesis and rheological characterization of linear and star-shaped polydimethylsiloxanes
spellingShingle Synthesis and rheological characterization of linear and star-shaped polydimethylsiloxanes
Ressia, Jorge Aníbal
Anionic Synthesis
Polydimetylsiloxane
Star-Shaped Polymers
Rheology
title_short Synthesis and rheological characterization of linear and star-shaped polydimethylsiloxanes
title_full Synthesis and rheological characterization of linear and star-shaped polydimethylsiloxanes
title_fullStr Synthesis and rheological characterization of linear and star-shaped polydimethylsiloxanes
title_full_unstemmed Synthesis and rheological characterization of linear and star-shaped polydimethylsiloxanes
title_sort Synthesis and rheological characterization of linear and star-shaped polydimethylsiloxanes
dc.creator.none.fl_str_mv Ressia, Jorge Aníbal
Villar, Marcelo Armando
Valles, Enrique Marcelo
author Ressia, Jorge Aníbal
author_facet Ressia, Jorge Aníbal
Villar, Marcelo Armando
Valles, Enrique Marcelo
author_role author
author2 Villar, Marcelo Armando
Valles, Enrique Marcelo
author2_role author
author
dc.subject.none.fl_str_mv Anionic Synthesis
Polydimetylsiloxane
Star-Shaped Polymers
Rheology
topic Anionic Synthesis
Polydimetylsiloxane
Star-Shaped Polymers
Rheology
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Linear polydimethylsiloxanes (PDMS) and 3‐ and 4‐arm star‐shaped PDMS of narrow molecular weight distribution (MWD) have been synthesized by anionic polymerization. The MWD was obtained by Size Exclusion Chromatography (SEC). Some of the anionically synthesized PDMS showed a relative broad MWD, especially when they were terminated after 3 or more days of reaction. In order to analyze the influence of the extent of reaction on the MWD, a polymerization with sample extractions at different conversions was performed. The MWD of the polymers synthesized at different extents of reaction were studied from a statistical point of view. Linear viscoelastic parameters of the synthesized polymers, such as storage (G′) and loss (G″) moduli, were obtained at different temperatures as functions of frequency (ω). Zero shear rate viscosity (η0) was calculated from the data obtained in the terminal relaxation zone. The molecular weight dependence of η0 shows a good agreement with classical models. Preliminary results obtained from the star polymers suggest an exponential increase in η0 with the number of entanglements per arm.
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: Villar, Marcelo Armando. 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
description Linear polydimethylsiloxanes (PDMS) and 3‐ and 4‐arm star‐shaped PDMS of narrow molecular weight distribution (MWD) have been synthesized by anionic polymerization. The MWD was obtained by Size Exclusion Chromatography (SEC). Some of the anionically synthesized PDMS showed a relative broad MWD, especially when they were terminated after 3 or more days of reaction. In order to analyze the influence of the extent of reaction on the MWD, a polymerization with sample extractions at different conversions was performed. The MWD of the polymers synthesized at different extents of reaction were studied from a statistical point of view. Linear viscoelastic parameters of the synthesized polymers, such as storage (G′) and loss (G″) moduli, were obtained at different temperatures as functions of frequency (ω). Zero shear rate viscosity (η0) was calculated from the data obtained in the terminal relaxation zone. The molecular weight dependence of η0 shows a good agreement with classical models. Preliminary results obtained from the star polymers suggest an exponential increase in η0 with the number of entanglements per arm.
publishDate 2001
dc.date.none.fl_str_mv 2001-03
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/11336/40221
Ressia, Jorge Aníbal; Villar, Marcelo Armando; Valles, Enrique Marcelo; Synthesis and rheological characterization of linear and star-shaped polydimethylsiloxanes; Wiley; Macromolecular Symposia; 168; 1; 3-2001; 43-54
1022-1360
CONICET Digital
CONICET
url http://hdl.handle.net/11336/40221
identifier_str_mv Ressia, Jorge Aníbal; Villar, Marcelo Armando; Valles, Enrique Marcelo; Synthesis and rheological characterization of linear and star-shaped polydimethylsiloxanes; Wiley; Macromolecular Symposia; 168; 1; 3-2001; 43-54
1022-1360
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1002/1521-3900(200103)168:1<43::AID-MASY43>3.0.CO;2-Y
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1002/1521-3900%28200103%29168%3A1%3C43%3A%3AAID-MASY43%3E3.0.CO%3B2-Y
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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