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Infrared spectroscopy studies of the effects of the catalyst on the ester cross‐linking of cellulose by poly(carboxylic acids)
Author(s) -
Yang Charles Q.
Publication year - 1993
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1993.070501202
Subject(s) - sodium hypophosphite , hypophosphite , cellulose , catalysis , chemistry , fourier transform infrared spectroscopy , organic chemistry , polymer chemistry , infrared spectroscopy , sodium , carboxylic acid , chemical modification , chemical engineering , electroplating , layer (electronics) , engineering
The esterification of cellulose by a poly(carboxylic acid) proceeds in two steps: the formation of a 5‐membered cyclic anhydride intermediate by the dehydration of two carboxyls, and the reaction between cellulose and the anhydride intermediate to form an ester. Sodium hypophosphite is the most effective catalyst for the esterification. The effect of sodium hypophosphite on the esterification of cotton cellulose was studied by Fourier transform infrared spectroscopy (FTIR). It was found that sodium hypophosphite accelerates both the formation of the cyclic anhydride intermediate and the reaction between the anhydride intermediate and cellulose. The chief role of sodium hypophosphite is possibly the acceleration of the esterification of cellulose by the anhydride intermediate. © 1993 John Wiley & Sons, Inc.