Transiently trapped entanglements in model polymer networks

Autores
Acosta, Rodolfo Héctor; Monti, Gustavo Alberto; Villar, Marcelo Armando; Valles, Enrique Marcelo; Vega, Daniel Alberto
Año de publicación
2009
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The relaxational dynamics of trapped entanglements in model silicone polymer networks is studied through the residual dipolar couplings (RDC) obtained by double quantum nuclear magnetic resonance (DQ NMR). These experiments were performed on model polymer networks containing linear pendant chains. The model networks where synthesized by end-linking a mixture of α,ω-divinyl poly(dimethylsiloxane) (B2) and ω-vinyl poly(dimethylsiloxane) (B1) with trifunctional (A3) or tetra-functional (A4) cross-linkers. At the time scale of the NMR experiments only a small fraction of the linear pendant chains B1 loses the memory of its early configuration. Then, the unrelaxed topological constrains involving pendant material render a nonzero average dipolar coupling that contributes to the solid-like behavior of the NMR response. Irrespective of the functionality of the cross-linkers, upon the presence in the network of pendant chains induced by the insertion of the B1 monofunctional poly(dimethylsiloxane) an important reduction in the RDC is observed as a consequence of the transiently trapped entanglements. It was also verified that, according to the viscoelastic response, the networks prepared with A4 cross-linkers show systematically higher values of the residual dipolar couplings than trifunctional cross-linked networks.
Fil: Acosta, Rodolfo Héctor. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina
Fil: Monti, Gustavo Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; 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
Fil: Vega, Daniel Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Sur; Argentina
Materia
Transiently Trapped Entanglements
Double Quantum Nuclear Magnetic Resonance
Model Silicone Polymer Networks
Pendant Chains
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:11336/45726
Acceder
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spelling Transiently trapped entanglements in model polymer networksAcosta, Rodolfo HéctorMonti, Gustavo AlbertoVillar, Marcelo ArmandoValles, Enrique MarceloVega, Daniel AlbertoTransiently Trapped EntanglementsDouble Quantum Nuclear Magnetic ResonanceModel Silicone Polymer NetworksPendant Chainshttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2The relaxational dynamics of trapped entanglements in model silicone polymer networks is studied through the residual dipolar couplings (RDC) obtained by double quantum nuclear magnetic resonance (DQ NMR). These experiments were performed on model polymer networks containing linear pendant chains. The model networks where synthesized by end-linking a mixture of α,ω-divinyl poly(dimethylsiloxane) (B2) and ω-vinyl poly(dimethylsiloxane) (B1) with trifunctional (A3) or tetra-functional (A4) cross-linkers. At the time scale of the NMR experiments only a small fraction of the linear pendant chains B1 loses the memory of its early configuration. Then, the unrelaxed topological constrains involving pendant material render a nonzero average dipolar coupling that contributes to the solid-like behavior of the NMR response. Irrespective of the functionality of the cross-linkers, upon the presence in the network of pendant chains induced by the insertion of the B1 monofunctional poly(dimethylsiloxane) an important reduction in the RDC is observed as a consequence of the transiently trapped entanglements. It was also verified that, according to the viscoelastic response, the networks prepared with A4 cross-linkers show systematically higher values of the residual dipolar couplings than trifunctional cross-linked networks.Fil: Acosta, Rodolfo Héctor. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; ArgentinaFil: Monti, Gustavo Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; 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; ArgentinaFil: Vega, Daniel Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Sur; ArgentinaAmerican Chemical Society2009-06info: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/11336/45726Acosta, Rodolfo Héctor; Monti, Gustavo Alberto; Villar, Marcelo Armando; Valles, Enrique Marcelo; Vega, Daniel Alberto; Transiently trapped entanglements in model polymer networks; American Chemical Society; Macromolecules; 42; 13; 6-2009; 4674-46800024-9297CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1021/ma8025546info:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/abs/10.1021/ma8025546info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:07:30Zoai:ri.conicet.gov.ar:11336/45726instacron: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:34982025-09-10 13:07:30.829CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Transiently trapped entanglements in model polymer networks
title Transiently trapped entanglements in model polymer networks
spellingShingle Transiently trapped entanglements in model polymer networks
Acosta, Rodolfo Héctor
Transiently Trapped Entanglements
Double Quantum Nuclear Magnetic Resonance
Model Silicone Polymer Networks
Pendant Chains
title_short Transiently trapped entanglements in model polymer networks
title_full Transiently trapped entanglements in model polymer networks
title_fullStr Transiently trapped entanglements in model polymer networks
title_full_unstemmed Transiently trapped entanglements in model polymer networks
title_sort Transiently trapped entanglements in model polymer networks
dc.creator.none.fl_str_mv Acosta, Rodolfo Héctor
Monti, Gustavo Alberto
Villar, Marcelo Armando
Valles, Enrique Marcelo
Vega, Daniel Alberto
author Acosta, Rodolfo Héctor
author_facet Acosta, Rodolfo Héctor
Monti, Gustavo Alberto
Villar, Marcelo Armando
Valles, Enrique Marcelo
Vega, Daniel Alberto
author_role author
author2 Monti, Gustavo Alberto
Villar, Marcelo Armando
Valles, Enrique Marcelo
Vega, Daniel Alberto
author2_role author
author
author
author
dc.subject.none.fl_str_mv Transiently Trapped Entanglements
Double Quantum Nuclear Magnetic Resonance
Model Silicone Polymer Networks
Pendant Chains
topic Transiently Trapped Entanglements
Double Quantum Nuclear Magnetic Resonance
Model Silicone Polymer Networks
Pendant Chains
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 relaxational dynamics of trapped entanglements in model silicone polymer networks is studied through the residual dipolar couplings (RDC) obtained by double quantum nuclear magnetic resonance (DQ NMR). These experiments were performed on model polymer networks containing linear pendant chains. The model networks where synthesized by end-linking a mixture of α,ω-divinyl poly(dimethylsiloxane) (B2) and ω-vinyl poly(dimethylsiloxane) (B1) with trifunctional (A3) or tetra-functional (A4) cross-linkers. At the time scale of the NMR experiments only a small fraction of the linear pendant chains B1 loses the memory of its early configuration. Then, the unrelaxed topological constrains involving pendant material render a nonzero average dipolar coupling that contributes to the solid-like behavior of the NMR response. Irrespective of the functionality of the cross-linkers, upon the presence in the network of pendant chains induced by the insertion of the B1 monofunctional poly(dimethylsiloxane) an important reduction in the RDC is observed as a consequence of the transiently trapped entanglements. It was also verified that, according to the viscoelastic response, the networks prepared with A4 cross-linkers show systematically higher values of the residual dipolar couplings than trifunctional cross-linked networks.
Fil: Acosta, Rodolfo Héctor. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina
Fil: Monti, Gustavo Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; 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
Fil: Vega, Daniel Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Sur; Argentina
description The relaxational dynamics of trapped entanglements in model silicone polymer networks is studied through the residual dipolar couplings (RDC) obtained by double quantum nuclear magnetic resonance (DQ NMR). These experiments were performed on model polymer networks containing linear pendant chains. The model networks where synthesized by end-linking a mixture of α,ω-divinyl poly(dimethylsiloxane) (B2) and ω-vinyl poly(dimethylsiloxane) (B1) with trifunctional (A3) or tetra-functional (A4) cross-linkers. At the time scale of the NMR experiments only a small fraction of the linear pendant chains B1 loses the memory of its early configuration. Then, the unrelaxed topological constrains involving pendant material render a nonzero average dipolar coupling that contributes to the solid-like behavior of the NMR response. Irrespective of the functionality of the cross-linkers, upon the presence in the network of pendant chains induced by the insertion of the B1 monofunctional poly(dimethylsiloxane) an important reduction in the RDC is observed as a consequence of the transiently trapped entanglements. It was also verified that, according to the viscoelastic response, the networks prepared with A4 cross-linkers show systematically higher values of the residual dipolar couplings than trifunctional cross-linked networks.
publishDate 2009
dc.date.none.fl_str_mv 2009-06
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/11336/45726
Acosta, Rodolfo Héctor; Monti, Gustavo Alberto; Villar, Marcelo Armando; Valles, Enrique Marcelo; Vega, Daniel Alberto; Transiently trapped entanglements in model polymer networks; American Chemical Society; Macromolecules; 42; 13; 6-2009; 4674-4680
0024-9297
CONICET Digital
CONICET
url http://hdl.handle.net/11336/45726
identifier_str_mv Acosta, Rodolfo Héctor; Monti, Gustavo Alberto; Villar, Marcelo Armando; Valles, Enrique Marcelo; Vega, Daniel Alberto; Transiently trapped entanglements in model polymer networks; American Chemical Society; Macromolecules; 42; 13; 6-2009; 4674-4680
0024-9297
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1021/ma8025546
info:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/abs/10.1021/ma8025546
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 American Chemical Society
publisher.none.fl_str_mv American Chemical Society
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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