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dc.contributor.authorCuadri Vega, Antonio Abad 
dc.contributor.authorGarcía Morales, Moisés 
dc.contributor.authorNavarro Domínguez, Francisco Javier 
dc.contributor.authorPartal López, Pedro
dc.identifier.citationCuadri Vega, A.A., García Morales, M., Navarro Domínguez, F.J., Partal López, P.: "Effect of transesterification degree and post-treatment on the in-service performance of NCO-functionalized vegetable oil bituminous products". Chemical Engineering Science. Vol. 11, págs. 126-134, (2014). DOI: 10.1016/j.ces.2014.02.028en_US
dc.identifier.issn1873-4405 (electrónico)
dc.description.abstractThe bitumen modification through polyurethane prepolymers presents significant benefits for the manufacture of bituminous products for the paving industry. In this sense, this work explores the use, as bitumen modifier, of a novel reactive prepolymer synthesized by reaction of 4,4´,diphenylmethane diisocyanate (MDI) and a vegetable oil-based polyol, castor oil (CO), previously transesterified with pentaerythritol. On the one hand, thermal analysis on transesterified CO revealed a highly stable prepolymer, making it suitable to be used for bitumen modification in a wide range of processing temperatures, 90-180 ºC. On the other hand, the bitumen modification achieved for the polyurethane-modified strongly depends on the transesterification degree and post-treatment procedures involved. In this sense, Atomic Force Microscopy (AFM) proved that MDI-prepolymers, based on castor oil transesterified with 4 wt.% pentaerythritol, lead to modified samples with a more complex microstructure which enhances rheological properties and reduces thermal susceptibility. In any case, viscoelastic and flow tests showed that the addition of small quantities of this reactive prepolymer to bitumen leads to products with enhanced performance at high in-service temperatures.en_US
dc.description.sponsorshipThis work is part of a research project sponsored by a MEC-FEDER programme (Research Project MAT2007-61460) and by a Junta de Andalucia Programme (TEP6689). The authors gratefully acknowledge its financial support. A.A. Cuadri also thanks “Ministerio de Educación” for the concession of a F.P.U. research grant (AP2008-01419).
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.subject.otherRheological propertiesen_US
dc.subject.otherMaterial processingen_US
dc.subject.otherProduct designen_US
dc.titleEffect of transesterification degree and post-treatment on the in-service performance of NCO-functionalized vegetable oil bituminous productsen_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/MEC-FEDER programme [MAT2007-61460]
dc.relation.projectIDinfo:eu-repo/grantAgreement/Junta de Andalucia Programme [TEP6689]
dc.relation.projectIDinfo:eu-repo/grantAgreement/Ministerio de Educacion [AP2008-01419]

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