Model polydimethylsiloxanes subjected to thermal weathering: Effect on molecular weight distributions

Autores
Valles, Enrique Marcelo; Sarmoria, Claudia; Villar, Marcelo Armando; Lazzari, Massimo; Chiantore, Oscar
Año de publicación
2000
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We have subjected samples of model polydimethylsiloxanes of narrow molecular weight distribution to thermo-oxidation in an air circulating oven. Samples remained for up to 1760 h at 200 °C under a standard atmosphere. Loss of average molecular weight and broadening of molecular weight distributions was observed. We have modeled the process assuming that both crosslinking and scission are present simultaneously. We have tried to interpret the experimental data in two different ways: either assuming that the ratio of crosslinking to scission was not constant, or that there is an induction period with no reaction before the polymer shows measurable effects of the attack. We discuss the relative merits of both interpretations.
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: Sarmoria, Claudia. 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: Lazzari, Massimo. Università di Torino; Italia
Fil: Chiantore, Oscar. Università di Torino; Italia
Materia
Model Polydimethylsiloxanes
Thermo-Oxidation
Modeling Degradation Process
Crosslinking And Scission
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:11336/37643
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Model polydimethylsiloxanes subjected to thermal weathering: Effect on molecular weight distributionsValles, Enrique MarceloSarmoria, ClaudiaVillar, Marcelo ArmandoLazzari, MassimoChiantore, OscarModel PolydimethylsiloxanesThermo-OxidationModeling Degradation ProcessCrosslinking And Scissionhttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2We have subjected samples of model polydimethylsiloxanes of narrow molecular weight distribution to thermo-oxidation in an air circulating oven. Samples remained for up to 1760 h at 200 °C under a standard atmosphere. Loss of average molecular weight and broadening of molecular weight distributions was observed. We have modeled the process assuming that both crosslinking and scission are present simultaneously. We have tried to interpret the experimental data in two different ways: either assuming that the ratio of crosslinking to scission was not constant, or that there is an induction period with no reaction before the polymer shows measurable effects of the attack. We discuss the relative merits of both interpretations.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; ArgentinaFil: Sarmoria, Claudia. 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: Lazzari, Massimo. Università di Torino; ItaliaFil: Chiantore, Oscar. Università di Torino; ItaliaElsevier2000-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/37643Valles, Enrique Marcelo; Sarmoria, Claudia; Villar, Marcelo Armando; Lazzari, Massimo; Chiantore, Oscar; Model polydimethylsiloxanes subjected to thermal weathering: Effect on molecular weight distributions; Elsevier; Polymer Degradation And Stability; 69; 1; 1-2000; 67-710141-3910CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/S0141-3910(00)00041-0info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0141391000000410info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:24:56Zoai:ri.conicet.gov.ar:11336/37643instacron: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:34982025-10-22 11:24:56.562CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Model polydimethylsiloxanes subjected to thermal weathering: Effect on molecular weight distributions
title Model polydimethylsiloxanes subjected to thermal weathering: Effect on molecular weight distributions
spellingShingle Model polydimethylsiloxanes subjected to thermal weathering: Effect on molecular weight distributions
Valles, Enrique Marcelo
Model Polydimethylsiloxanes
Thermo-Oxidation
Modeling Degradation Process
Crosslinking And Scission
title_short Model polydimethylsiloxanes subjected to thermal weathering: Effect on molecular weight distributions
title_full Model polydimethylsiloxanes subjected to thermal weathering: Effect on molecular weight distributions
title_fullStr Model polydimethylsiloxanes subjected to thermal weathering: Effect on molecular weight distributions
title_full_unstemmed Model polydimethylsiloxanes subjected to thermal weathering: Effect on molecular weight distributions
title_sort Model polydimethylsiloxanes subjected to thermal weathering: Effect on molecular weight distributions
dc.creator.none.fl_str_mv Valles, Enrique Marcelo
Sarmoria, Claudia
Villar, Marcelo Armando
Lazzari, Massimo
Chiantore, Oscar
author Valles, Enrique Marcelo
author_facet Valles, Enrique Marcelo
Sarmoria, Claudia
Villar, Marcelo Armando
Lazzari, Massimo
Chiantore, Oscar
author_role author
author2 Sarmoria, Claudia
Villar, Marcelo Armando
Lazzari, Massimo
Chiantore, Oscar
author2_role author
author
author
author
dc.subject.none.fl_str_mv Model Polydimethylsiloxanes
Thermo-Oxidation
Modeling Degradation Process
Crosslinking And Scission
topic Model Polydimethylsiloxanes
Thermo-Oxidation
Modeling Degradation Process
Crosslinking And Scission
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv We have subjected samples of model polydimethylsiloxanes of narrow molecular weight distribution to thermo-oxidation in an air circulating oven. Samples remained for up to 1760 h at 200 °C under a standard atmosphere. Loss of average molecular weight and broadening of molecular weight distributions was observed. We have modeled the process assuming that both crosslinking and scission are present simultaneously. We have tried to interpret the experimental data in two different ways: either assuming that the ratio of crosslinking to scission was not constant, or that there is an induction period with no reaction before the polymer shows measurable effects of the attack. We discuss the relative merits of both interpretations.
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: Sarmoria, Claudia. 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: Lazzari, Massimo. Università di Torino; Italia
Fil: Chiantore, Oscar. Università di Torino; Italia
description We have subjected samples of model polydimethylsiloxanes of narrow molecular weight distribution to thermo-oxidation in an air circulating oven. Samples remained for up to 1760 h at 200 °C under a standard atmosphere. Loss of average molecular weight and broadening of molecular weight distributions was observed. We have modeled the process assuming that both crosslinking and scission are present simultaneously. We have tried to interpret the experimental data in two different ways: either assuming that the ratio of crosslinking to scission was not constant, or that there is an induction period with no reaction before the polymer shows measurable effects of the attack. We discuss the relative merits of both interpretations.
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/11336/37643
Valles, Enrique Marcelo; Sarmoria, Claudia; Villar, Marcelo Armando; Lazzari, Massimo; Chiantore, Oscar; Model polydimethylsiloxanes subjected to thermal weathering: Effect on molecular weight distributions; Elsevier; Polymer Degradation And Stability; 69; 1; 1-2000; 67-71
0141-3910
CONICET Digital
CONICET
url http://hdl.handle.net/11336/37643
identifier_str_mv Valles, Enrique Marcelo; Sarmoria, Claudia; Villar, Marcelo Armando; Lazzari, Massimo; Chiantore, Oscar; Model polydimethylsiloxanes subjected to thermal weathering: Effect on molecular weight distributions; Elsevier; Polymer Degradation And Stability; 69; 1; 1-2000; 67-71
0141-3910
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/S0141-3910(00)00041-0
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0141391000000410
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
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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 12.982451

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