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Influence of Organic Diluents on Cellulose Carboxymethylation
Author(s) -
Olaru N.,
Olaru L.
Publication year - 2001
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20010101)202:1<207::aid-macp207>3.0.co;2-q
Subject(s) - acetone , isopropyl alcohol , cellulose , chemistry , isopropyl , ethanol , alcohol , organic chemistry , polymer chemistry , diluent , cellulose acetate , nuclear chemistry
Abstract A comparative study of the influence of acetone, isopropyl alcohol and mixtures of ethanol‐acetone and ethanol‐isopropyl alcohol on the cellulose structure during alkalization is presented. The kinetic behavior and distribution of substituents in the carboxymethylation stage are explained tentatively. It is shown that the decrystallization is more pronounced and the proportion of cellulose I is higher for samples alkalized in ethanol‐isopropanol and ethanol‐acetone mixtures containing up to about 50% ethanol, as compared with those produced in isopropyl alcohol or acetone. The distribution of substituents in the C 6 position, as evaluated by 1 H NMR spectroscopy, is correlatedwith the change of the cellulose structure revealed by X‐ray analysis data.