ISSN:
0022-3832
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Catechin 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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1958.1202912011
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