DERIVATIZATION OF CELLULOSE IN HOMOGENEOUS CONDITION - 1-CELLULOSE PROPIONATE

Samples of cellulose propionate were prepared by reaction of propionyl chloride with cellulose dissolved in dimethylacetamide/5% LiCl. The v alues of the substitution degree (DS) as well as the purity of the pro ducts were determined. The trend in chain rigidity in terms of the per sistence length as a function of DS was obtained by applying the Yamak awa-Fujii method to the intrinsic viscosity values. The rigidity progr essively decreases with DS. All the samples keep mesogenic behaviours. Copyright (C) 1997 Elsevier Science Ltd. All rights reserved.