Influence of the prepolymer molecular weight and free isocyanate content on the rheology of polyurethane modified bitumens

Isocyanate-based modification is lately gaining acceptance as a successful way to give added value to bitumen, a crude oil refining by-product. In order to study the influence of prepolymer type on the rheological properties of the resulting binders, six prepolymers synthesized from polypropylene-gl...

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Detalles Bibliográficos
Autores: Carrera Páez, Virginia, Cuadri Vega, Antonio Abad, García Morales, Moisés, Partal López, Pedro
Tipo de recurso: artículo
Fecha de publicación:2014
País:España
Institución:Universidad de Huelva (UHU)
Repositorio:Arias Montano. Repositorio Institucional de la Universidad de Huelva
Idioma:inglés
OAI Identifier:oai:ariasmontano.uhu.es:10272/12106
Acceso en línea:http://hdl.handle.net/10272/12106
Access Level:acceso abierto
Palabra clave:Bitumen
Rheology
Isocyanate
Polyurethane
Product design
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spelling Influence of the prepolymer molecular weight and free isocyanate content on the rheology of polyurethane modified bitumensCarrera Páez, VirginiaCuadri Vega, Antonio AbadGarcía Morales, MoisésPartal López, PedroBitumenRheologyIsocyanatePolyurethaneProduct designIsocyanate-based modification is lately gaining acceptance as a successful way to give added value to bitumen, a crude oil refining by-product. In order to study the influence of prepolymer type on the rheological properties of the resulting binders, six prepolymers synthesized from polypropylene-glycols (PPG) with varying molecular weight (between 440 and 2425) and different molar excess of a polymeric MDI (4,4’-diphenylmethane diisocyanate) were used. Two modification procedures, either involving or not water addition were followed. The modification achieved depends on both the selected polyol molecular weight and the excess in MDI (i.e., free isocyanate content), although not in a similar extent. Viscous flow and dynamic oscillatory shear tests, at 60 ºC, demonstrated a much higher level of bitumen modification by using the prepolymer prepared with the polyol having a molecular weight of 940 and with a free isocyanate content of 17.4 wt.%, mainly after addition of water. On the other hand, bitumen nature greatly affects the final rheological properties of these bituminous products. In that sense, modification results much more effective when conducted on bitumen with a well-developed colloidal microstructure.Elsevier20142014-01-0120142014-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10272/12106reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelvainstname:Universidad de Huelva (UHU)InglésengMinisterio de Educación y Ciencia Not available Not availableJunta de Andalucia Programme [TEP6689] Not available Not availableMinisterio de Educacion [AP2008-01419] Not available Not availableopen accesshttp://purl.org/coar/access_right/c_abf2Atribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:ariasmontano.uhu.es:10272/121062026-06-02T14:58:11Z
dc.title.none.fl_str_mv Influence of the prepolymer molecular weight and free isocyanate content on the rheology of polyurethane modified bitumens
title Influence of the prepolymer molecular weight and free isocyanate content on the rheology of polyurethane modified bitumens
spellingShingle Influence of the prepolymer molecular weight and free isocyanate content on the rheology of polyurethane modified bitumens
Carrera Páez, Virginia
Bitumen
Rheology
Isocyanate
Polyurethane
Product design
title_short Influence of the prepolymer molecular weight and free isocyanate content on the rheology of polyurethane modified bitumens
title_full Influence of the prepolymer molecular weight and free isocyanate content on the rheology of polyurethane modified bitumens
title_fullStr Influence of the prepolymer molecular weight and free isocyanate content on the rheology of polyurethane modified bitumens
title_full_unstemmed Influence of the prepolymer molecular weight and free isocyanate content on the rheology of polyurethane modified bitumens
title_sort Influence of the prepolymer molecular weight and free isocyanate content on the rheology of polyurethane modified bitumens
dc.creator.none.fl_str_mv Carrera Páez, Virginia
Cuadri Vega, Antonio Abad
García Morales, Moisés
Partal López, Pedro
author Carrera Páez, Virginia
author_facet Carrera Páez, Virginia
Cuadri Vega, Antonio Abad
García Morales, Moisés
Partal López, Pedro
author_role author
author2 Cuadri Vega, Antonio Abad
García Morales, Moisés
Partal López, Pedro
author2_role author
author
author
dc.contributor.none.fl_str_mv
dc.subject.none.fl_str_mv Bitumen
Rheology
Isocyanate
Polyurethane
Product design
topic Bitumen
Rheology
Isocyanate
Polyurethane
Product design
description Isocyanate-based modification is lately gaining acceptance as a successful way to give added value to bitumen, a crude oil refining by-product. In order to study the influence of prepolymer type on the rheological properties of the resulting binders, six prepolymers synthesized from polypropylene-glycols (PPG) with varying molecular weight (between 440 and 2425) and different molar excess of a polymeric MDI (4,4’-diphenylmethane diisocyanate) were used. Two modification procedures, either involving or not water addition were followed. The modification achieved depends on both the selected polyol molecular weight and the excess in MDI (i.e., free isocyanate content), although not in a similar extent. Viscous flow and dynamic oscillatory shear tests, at 60 ºC, demonstrated a much higher level of bitumen modification by using the prepolymer prepared with the polyol having a molecular weight of 940 and with a free isocyanate content of 17.4 wt.%, mainly after addition of water. On the other hand, bitumen nature greatly affects the final rheological properties of these bituminous products. In that sense, modification results much more effective when conducted on bitumen with a well-developed colloidal microstructure.
publishDate 2014
dc.date.none.fl_str_mv 2014
2014-01-01
2014
2014-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10272/12106
url http://hdl.handle.net/10272/12106
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Ministerio de Educación y Ciencia Not available Not available
Junta de Andalucia Programme [TEP6689] Not available Not available
Ministerio de Educacion [AP2008-01419] Not available Not available
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial-SinDerivadas 3.0 España
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
Atribución-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelva
instname:Universidad de Huelva (UHU)
instname_str Universidad de Huelva (UHU)
reponame_str Arias Montano. Repositorio Institucional de la Universidad de Huelva
collection Arias Montano. Repositorio Institucional de la Universidad de Huelva
repository.name.fl_str_mv
repository.mail.fl_str_mv
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