A simple model to describe the thixotropic behavior of paints.

We propose a simple rheological model to describe the thixotropic behavior of paints, since the classical hysteresis area, which is usually used, is not enough to evaluate thixotropy. The model is based on the assumption that viscosity is a direct measure of the structural level of the paint. The mo...

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Detalles Bibliográficos
Autores: Armelin, Elaine, Martí, Mireia, Rudé i Payró, Elisabet, Labanda, Jordi, Llorens Llacuna, Joan, Alemán, Carlos
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2006
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/46105
Acceso en línea:https://hdl.handle.net/2445/46105
Access Level:acceso abierto
Palabra clave:Reologia
Tixotropia
Histèresi
Temperatura
Pintura (Producte químic)
Rheology
Thixotropy
Hysteresis
Temperature
Paint
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spelling A simple model to describe the thixotropic behavior of paints.Armelin, ElaineMartí, MireiaRudé i Payró, ElisabetLabanda, JordiLlorens Llacuna, JoanAlemán, CarlosReologiaTixotropiaHistèresiTemperaturaPintura (Producte químic)RheologyThixotropyHysteresisTemperaturePaintWe propose a simple rheological model to describe the thixotropic behavior of paints, since the classical hysteresis area, which is usually used, is not enough to evaluate thixotropy. The model is based on the assumption that viscosity is a direct measure of the structural level of the paint. The model depends on two equations: the Cross-Carreau equation to describe the equilibrium viscosity and a second order kinetic equation to express the time dependence of viscosity. Two characteristic thixotropic times are differentiated: one for the net structure breakdown, which is defined as a power law function of shear rate, and an other for the net structure buildup, which is not dependent on the shear rate. The knowledge of both kinetic processes can be used to improve the quality and applicability of paints. Five representative commercial protective marine paints are tested. They are based on chlorinated rubber, acrylic, alkyd, vinyl, and epoxy resins. The temperature dependence of the rheological behavior is also studied with the temperature ranging from 5 ºC to 35 ºC. It is found that the paints exhibit both shear thinning and thixotropic behavior. The model fits satisfactorily the thixotropy of the studied paints. It is also able to predict the thixotropy dependence on temperature. Both viscosity and the degree of thixotropy increase as the temperature decreases.Elsevier B.V.2013201320062013info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion23 p.application/pdfhttps://hdl.handle.net/2445/46105Articles publicats en revistes (Enginyeria Química i Química Analítica)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésVersió postprint del document publicat a: http://dx.doi.org/10.1016/j.porgcoat.2006.09.002Progress in Organic Coatings, 2006, vol. 57, num. 3, p. 229-235http://dx.doi.org/10.1016/j.porgcoat.2006.09.002(c) Elsevier B.V., 2006info:eu-repo/semantics/openAccessoai:recercat.cat:2445/461052026-05-29T05:05:01Z
dc.title.none.fl_str_mv A simple model to describe the thixotropic behavior of paints.
title A simple model to describe the thixotropic behavior of paints.
spellingShingle A simple model to describe the thixotropic behavior of paints.
Armelin, Elaine
Reologia
Tixotropia
Histèresi
Temperatura
Pintura (Producte químic)
Rheology
Thixotropy
Hysteresis
Temperature
Paint
title_short A simple model to describe the thixotropic behavior of paints.
title_full A simple model to describe the thixotropic behavior of paints.
title_fullStr A simple model to describe the thixotropic behavior of paints.
title_full_unstemmed A simple model to describe the thixotropic behavior of paints.
title_sort A simple model to describe the thixotropic behavior of paints.
dc.creator.none.fl_str_mv Armelin, Elaine
Martí, Mireia
Rudé i Payró, Elisabet
Labanda, Jordi
Llorens Llacuna, Joan
Alemán, Carlos
author Armelin, Elaine
author_facet Armelin, Elaine
Martí, Mireia
Rudé i Payró, Elisabet
Labanda, Jordi
Llorens Llacuna, Joan
Alemán, Carlos
author_role author
author2 Martí, Mireia
Rudé i Payró, Elisabet
Labanda, Jordi
Llorens Llacuna, Joan
Alemán, Carlos
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Reologia
Tixotropia
Histèresi
Temperatura
Pintura (Producte químic)
Rheology
Thixotropy
Hysteresis
Temperature
Paint
topic Reologia
Tixotropia
Histèresi
Temperatura
Pintura (Producte químic)
Rheology
Thixotropy
Hysteresis
Temperature
Paint
description We propose a simple rheological model to describe the thixotropic behavior of paints, since the classical hysteresis area, which is usually used, is not enough to evaluate thixotropy. The model is based on the assumption that viscosity is a direct measure of the structural level of the paint. The model depends on two equations: the Cross-Carreau equation to describe the equilibrium viscosity and a second order kinetic equation to express the time dependence of viscosity. Two characteristic thixotropic times are differentiated: one for the net structure breakdown, which is defined as a power law function of shear rate, and an other for the net structure buildup, which is not dependent on the shear rate. The knowledge of both kinetic processes can be used to improve the quality and applicability of paints. Five representative commercial protective marine paints are tested. They are based on chlorinated rubber, acrylic, alkyd, vinyl, and epoxy resins. The temperature dependence of the rheological behavior is also studied with the temperature ranging from 5 ºC to 35 ºC. It is found that the paints exhibit both shear thinning and thixotropic behavior. The model fits satisfactorily the thixotropy of the studied paints. It is also able to predict the thixotropy dependence on temperature. Both viscosity and the degree of thixotropy increase as the temperature decreases.
publishDate 2006
dc.date.none.fl_str_mv 2006
2013
2013
2013
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/46105
url https://hdl.handle.net/2445/46105
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: http://dx.doi.org/10.1016/j.porgcoat.2006.09.002
Progress in Organic Coatings, 2006, vol. 57, num. 3, p. 229-235
http://dx.doi.org/10.1016/j.porgcoat.2006.09.002
dc.rights.none.fl_str_mv (c) Elsevier B.V., 2006
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Elsevier B.V., 2006
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 23 p.
application/pdf
dc.publisher.none.fl_str_mv Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
dc.source.none.fl_str_mv Articles publicats en revistes (Enginyeria Química i Química Analítica)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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