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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.: "Processing of bitumens modified by a bio-oil-derived polyurethane". Fuel. Vol. 118, págs. 83-90, (2014). DOI: 10.1016/j.fuel.2013.10.068en_US
dc.identifier.issn1873-7153 (electrónico)
dc.description.abstractCastor oil (CO) functionalized by isocyanate groups (–NCO) is proposed as a novel bio-based reactive polyurethane (PU) for bitumen modification. This work presents a comparative analysis conducted on blends of bitumen and 2 wt.% of a PU prepolymer prepared by NCO-functionalization of castor oil. Four preparation procedures were evaluated, which resulted from the combination of two processing times (1h or 24h, at 90ºC) followed by two different post-treatments (water addition or ambient curing for up to 6 months). It was found that the degree of modification attained after post-treatment depends on the previous processing conditions. Thus, short processing times are required if the binder is further subjected to ambient curing. Instead, the success of the water-addition modification falls on a previous long processing step. As revealed by rheological tests, ambient curing was seen to be by far a more efficient way of modification if compared to direct addition of water, and makes clear that the resulting binder evolves towards a better performance when in service. In that sense, Thin Layer Chromatography tests, Modulated DSC and AFM images demonstrated a more complex microstructure characterized by the presence of a larger content of molecules with higher polarity, size and molecular weight.en_US
dc.description.sponsorshipThis work is part of two research projects sponsored by a MEC-FEDER Programme (Research Project MAT2007-61460) and by a Junta de Andalucia Programme - 19 - (TEP6689). The authors gratefully acknowledge their financial support. A.A. Cuadri also thanks “Ministerio de Educación” for the concession of a F.P.U. research grant (AP2008-01419).en_US
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.subject.otherCastor oilen_US
dc.subject.otherProduct designen_US
dc.titleProcessing of bitumens modified by a bio-oil-derived polyurethaneen_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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