Electrochemical reductive polymerization of divanillin in aqueous sodium hydroxide using a lead cathode gives polyvanillin in 91% yield. The product was characterized by elemental analysis, UV-Vis, FT-IR, 1 H, 13 C NMR, TGA-DTGA, and GPC.

Condensation of renewable resources-based monomer divanillin with alkyl diamines gives Schiff base polymers with degree of polymerization (DP) ∼25-32 in 88-95% yield. These yellow polymers are insoluble in water and common organic solvents, slightly soluble in warm DMSO, DMF and dissolves in aqueous NaOH. The polymers were characterized using FT-IR, 1 H, and 13 C NMR spectroscopy and by comparison with the model compound N, N -bis(vanillidene)-1,3-propanediamine. Polymer prepared by condensation of divanillin and 1,6-diaminohexane is shown to chelate with Cu(II), Fe(II), and Co(II) metal ions in basic aqueous methanol.

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Condensation of all renewable resources based monomers 2,5-furandicarboxylic acid and glycerol in the presence of 2 mol% Sb2O3catalyst at 210°C gives a branched polyester resin in 70% yield. This resin was characterized by elemental analysis,1H,13C NMR, FT-IR, and TGA-DTG.

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