Renewable resources based polymers: Synthesis and characterization of 2,5-diformylfuran-urea resin

Condensation of renewable resources based monomer 2,5-diformylfuran (DFF) and urea at 110 degrees C by melting a solid Mixture gives a crystalline polymer resin in 90% yield. This resin was characterized by elemental analysis, H-1, C-13 and H-1-H-1 COSY NMR, IR, UV, TGA and DTA. The structural unit of this new material consists of one DFF molecule condensed with two urea molecules at the aldehyde group of DFF. A homologous resin was prepared by using 5,5'-oxydimethylenebis(2-furaldehyde) and Urea in 84% yield via a similar procedure and characterized as well. (C) 2009 Published by Elsevier Ltd.