publication . Article . 2014

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

Carrera Páez, Virginia; Cuadri Vega, Antonio Abad; García Morales, Moisés; Partal López, Pedro;
Open Access
  • Published: 01 Jan 2014 Journal: European Polymer Journal, volume 57, pages 151-159 (issn: 0014-3057, Copyright policy)
  • Publisher: Elsevier BV
  • Country: Spain
Abstract
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 conte...
Subjects
free text keywords: Bitumen, Product design, Organic Chemistry, General Physics and Astronomy, Polymers and Plastics, Colloid, Polyol, chemistry.chemical_classification, chemistry, Asphalt, Prepolymer, Microstructure, Composite material, Rheology, Polyurethane, chemistry.chemical_compound, Materials science, Isocyanate
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publication . Article . 2014

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

Carrera Páez, Virginia; Cuadri Vega, Antonio Abad; García Morales, Moisés; Partal López, Pedro;