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- W2023690828 abstract "Abstract Stable bituminous foams have been obtained by using a 35/50 penetration grade bitumen and a reactive prepolymer (MDI-PPG) synthesized by the reaction of polymeric 4,4′-diphenylmethane diisocyanate (MDI) with a low molecular weight polypropylene glycol (PPG). In a first step, MDI-PPG and bitumen were allowed to react for up to 7 days. Foams were then obtained by adding an excess of water. The results obtained point out important changes in the material colloidal structure, as a consequence of the reactions between the –NCO groups and bitumen most polar fractions. Modification led to bituminous foams with low density and improved in-service properties (higher elasticity and resistance to deformation at high in-service temperatures, reduced thermal susceptibility and better flexibility at low temperatures), demonstrating their adequacy to be used in building applications. Properties were enhanced by subjecting the material to longer periods of curing prior to promote foaming." @default.
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- W2023690828 date "2014-08-01" @default.
- W2023690828 modified "2023-10-18" @default.
- W2023690828 title "Thermo-mechanical properties and microstructural considerations of MDI isocyanate-based bituminous foams" @default.
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- W2023690828 doi "https://doi.org/10.1016/j.matchemphys.2014.03.018" @default.
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