Abstract
AbstractCatechin tannins are formed by the action of protons on catechins, by condensation of the carbon atom from the ether bridge in the 2‐position with one of the phenyl rings of the next molecule. As the molecule is bi‐ or polyfunctional, the reaction can proceed further until it ceases, on account of the low solubility of the reaction product. Lignin is formed by dehydrogenation of p‐hydroxy‐cinnamic alcohols. The radicals produced stabilize themselves by combining, giving various types of dimeric products. These, too, are phenols and by virtue of further dehydrogenation, are subjected to a mixed condensation and, in part, to polymerization. In both cases, a highly irregular polymer molecule is formed from a single basic substance.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
