Time-temperature-transformation (TTT) diagram of a dual-curable off-stoichiometric epoxy-amine system with latent reactivity

The time-temperature-transformation (TTT) diagram of the curing an off-stoichiometric amine-epoxy formulation with intermediate latent reactivity has been elaborated. The first curing stage is an epoxy-amine polycondensation taking place at low temperatures, while the second curing stage is an anion...

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Autores: Areny, Núria, Konuray, Ali Osman|||0000-0001-7281-006X, Fernández Francos, Xavier|||0000-0002-3492-2922, Salla Tarragó, José María|||0000-0002-5409-8416, Morancho Llena, José María|||0000-0002-9416-3657, Ramis Juan, Xavier|||0000-0003-2550-7185
Formato: artículo
Fecha de publicación:2018
País:España
Recursos:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/119840
Acesso em linha:https://hdl.handle.net/2117/119840
https://dx.doi.org/10.1016/j.tca.2018.06.012
Access Level:acceso abierto
Palavra-chave:Thermoplastics
Thermodynamics
Epoxy
Diamine
Dual-Curing
Latent base
Thermosets
Time-Temperature-Transformation (TTT) diagram
Termoplàstics
Termodinàmica
Àrees temàtiques de la UPC::Enginyeria dels materials::Materials plàstics i polímers
Àrees temàtiques de la UPC::Física::Termodinàmica
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oai_identifier_str oai:upcommons.upc.edu:2117/119840
network_acronym_str ES
network_name_str España
repository_id_str
spelling Time-temperature-transformation (TTT) diagram of a dual-curable off-stoichiometric epoxy-amine system with latent reactivityAreny, NúriaKonuray, Ali Osman|||0000-0001-7281-006XFernández Francos, Xavier|||0000-0002-3492-2922Salla Tarragó, José María|||0000-0002-5409-8416Morancho Llena, José María|||0000-0002-9416-3657Ramis Juan, Xavier|||0000-0003-2550-7185ThermoplasticsThermodynamicsEpoxyDiamineDual-CuringLatent baseThermosetsTime-Temperature-Transformation (TTT) diagramTermoplàsticsTermodinàmicaÀrees temàtiques de la UPC::Enginyeria dels materials::Materials plàstics i polímersÀrees temàtiques de la UPC::Física::TermodinàmicaThe time-temperature-transformation (TTT) diagram of the curing an off-stoichiometric amine-epoxy formulation with intermediate latent reactivity has been elaborated. The first curing stage is an epoxy-amine polycondensation taking place at low temperatures, while the second curing stage is an anionic homopolymerization of the excess epoxy groups, taking place at high temperatures and catalyzed by a latent base. The curing kinetics of the first and second curing stages have been analyzed separately by integral isoconversional procedures, and the kinetics data has been used to plot the isoconversion lines in the TTT diagram. The relationship between the glass transition temperature () and conversion has been determined experimentally and theoretically and used to determine the vitrification line in the TTT diagram. The results reflect the clearly different kinetic behaviour of both curing stages and a significant intermediate storage stability, which makes these curing systems highly attractive for multiple stage processing. The shape of the vitrification line also reflects the occurrence of different curing processes with different structure build-up. Safe processing and storage conditions can be easily defined on the basis of the TTT diagram. This is the first time the curing behaviour of dual-curing formulations is illustrated in such a clear and concise way thanks to the TTT diagram.20182018-08-1020182018-07-24journal articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/119840https://dx.doi.org/10.1016/j.tca.2018.06.012reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivs 3.0 Spainhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/1198402026-05-27T15:37:01Z
dc.title.none.fl_str_mv Time-temperature-transformation (TTT) diagram of a dual-curable off-stoichiometric epoxy-amine system with latent reactivity
title Time-temperature-transformation (TTT) diagram of a dual-curable off-stoichiometric epoxy-amine system with latent reactivity
spellingShingle Time-temperature-transformation (TTT) diagram of a dual-curable off-stoichiometric epoxy-amine system with latent reactivity
Areny, Núria
Thermoplastics
Thermodynamics
Epoxy
Diamine
Dual-Curing
Latent base
Thermosets
Time-Temperature-Transformation (TTT) diagram
Termoplàstics
Termodinàmica
Àrees temàtiques de la UPC::Enginyeria dels materials::Materials plàstics i polímers
Àrees temàtiques de la UPC::Física::Termodinàmica
title_short Time-temperature-transformation (TTT) diagram of a dual-curable off-stoichiometric epoxy-amine system with latent reactivity
title_full Time-temperature-transformation (TTT) diagram of a dual-curable off-stoichiometric epoxy-amine system with latent reactivity
title_fullStr Time-temperature-transformation (TTT) diagram of a dual-curable off-stoichiometric epoxy-amine system with latent reactivity
title_full_unstemmed Time-temperature-transformation (TTT) diagram of a dual-curable off-stoichiometric epoxy-amine system with latent reactivity
title_sort Time-temperature-transformation (TTT) diagram of a dual-curable off-stoichiometric epoxy-amine system with latent reactivity
dc.creator.none.fl_str_mv Areny, Núria
Konuray, Ali Osman|||0000-0001-7281-006X
Fernández Francos, Xavier|||0000-0002-3492-2922
Salla Tarragó, José María|||0000-0002-5409-8416
Morancho Llena, José María|||0000-0002-9416-3657
Ramis Juan, Xavier|||0000-0003-2550-7185
author Areny, Núria
author_facet Areny, Núria
Konuray, Ali Osman|||0000-0001-7281-006X
Fernández Francos, Xavier|||0000-0002-3492-2922
Salla Tarragó, José María|||0000-0002-5409-8416
Morancho Llena, José María|||0000-0002-9416-3657
Ramis Juan, Xavier|||0000-0003-2550-7185
author_role author
author2 Konuray, Ali Osman|||0000-0001-7281-006X
Fernández Francos, Xavier|||0000-0002-3492-2922
Salla Tarragó, José María|||0000-0002-5409-8416
Morancho Llena, José María|||0000-0002-9416-3657
Ramis Juan, Xavier|||0000-0003-2550-7185
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Thermoplastics
Thermodynamics
Epoxy
Diamine
Dual-Curing
Latent base
Thermosets
Time-Temperature-Transformation (TTT) diagram
Termoplàstics
Termodinàmica
Àrees temàtiques de la UPC::Enginyeria dels materials::Materials plàstics i polímers
Àrees temàtiques de la UPC::Física::Termodinàmica
topic Thermoplastics
Thermodynamics
Epoxy
Diamine
Dual-Curing
Latent base
Thermosets
Time-Temperature-Transformation (TTT) diagram
Termoplàstics
Termodinàmica
Àrees temàtiques de la UPC::Enginyeria dels materials::Materials plàstics i polímers
Àrees temàtiques de la UPC::Física::Termodinàmica
description The time-temperature-transformation (TTT) diagram of the curing an off-stoichiometric amine-epoxy formulation with intermediate latent reactivity has been elaborated. The first curing stage is an epoxy-amine polycondensation taking place at low temperatures, while the second curing stage is an anionic homopolymerization of the excess epoxy groups, taking place at high temperatures and catalyzed by a latent base. The curing kinetics of the first and second curing stages have been analyzed separately by integral isoconversional procedures, and the kinetics data has been used to plot the isoconversion lines in the TTT diagram. The relationship between the glass transition temperature () and conversion has been determined experimentally and theoretically and used to determine the vitrification line in the TTT diagram. The results reflect the clearly different kinetic behaviour of both curing stages and a significant intermediate storage stability, which makes these curing systems highly attractive for multiple stage processing. The shape of the vitrification line also reflects the occurrence of different curing processes with different structure build-up. Safe processing and storage conditions can be easily defined on the basis of the TTT diagram. This is the first time the curing behaviour of dual-curing formulations is illustrated in such a clear and concise way thanks to the TTT diagram.
publishDate 2018
dc.date.none.fl_str_mv 2018
2018-08-10
2018
2018-07-24
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/119840
https://dx.doi.org/10.1016/j.tca.2018.06.012
url https://hdl.handle.net/2117/119840
https://dx.doi.org/10.1016/j.tca.2018.06.012
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300719

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