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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/37643
Ver los metadatos del registro completo
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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 Técnicas2025-09-29T09:55:47Zoai: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:34982025-09-29 09:55:47.571CONICET 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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1844613680217456640 |
score |
13.070432 |