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Studies on enzymatic resistance and molecular structure by 13 C‐NMR of cellulosic ethers
Author(s) -
MartinezRicha A.,
MuñozAlarcon H.,
JosephNathan P.
Publication year - 1992
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.1992.070440218
Subject(s) - cellulosic ethanol , polymer , chemistry , carbon 13 nmr , organic chemistry , high resolution , molar mass , polymer chemistry , cellulose , materials science , remote sensing , geology
A viscometric method to evaluate the enzymatic resistance of cellulosic ethers is proposed. The method was applied to samples of hydroxyethylcellulose (HEC) with molar substitution between 1.8 and 2.5. The results are discussed in terms of the values of Degree of Substitution and the average unsubstituted primary hydroxyl groups, obtained by high‐resolution 13 C‐NMR of the neat polymers.