Recovery of Polyol and Aromatic Amines from Rigid Polyurethane Foams via Ammonolysis.

Upon an increase of the aromatic yield (which is defined as the molar fraction of isocyanate-derived groups that have reacted with NH 3 to form either amine or urea groups and are recovered in the liquid phase), a clear trend becomes apparent in the GPC chromatogram ( Figure , see section S2.4 ).

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