SCHEMATIC STRUCTURE OF A FRAGMENT OF THE COTTONPLANT LIGNEV MACROMOLECULE

摘要

The results of a study of the structure of the dioxane lignin (DLA) of mature cottonplant stems from the variety 108-F by chemical methods and an analysis of its quantitative lR and l3C NMR spectra has permitted us to calculate the average structure of the DLA macromolecule and to show it as a schematic formula. The numbers of phenylpropane structural units (PPSUs) contained in schematic structures proposed previously for average fragments of lignin macromblecules were 18 [1] and 28 [2] for spruce lignin,j 14 for reed lignin [3], and 15 for beech lignin [4].