Abstract
AbstractInfrared spectroscopic studies on some phenolic resins prepared by condensation of phenol with furfural, xylose, glucose, holocellulose, resistant cellulose, pure soda lignin, and bagasse pith, were carried out. The IR spectrum of soda ligninphenol resin proves the presence of aliphatic methyl, methylene, methine and strong bonded OH groups. Drastic changes in band position and intensity are observed in the IR spectra of pure soda lignin or bagasse pith and the respective phenolic resins, indicating that degradation processes could take place during the condensation reactions. The IR spectra of fractions of the bagasse pith‐phenol resin give an insight in the complicated structure of this resin. NMR and UV spectroscopic studies confirm the IR data.
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