Cellulose dissolution in lithium chloride/N,N-dimethylacetamide solvent system: Relevance of kinetics of decrystallization to cellulose derivatization under homogeneous solution conditions
Ga. Marson et Oa. El Seoud, Cellulose dissolution in lithium chloride/N,N-dimethylacetamide solvent system: Relevance of kinetics of decrystallization to cellulose derivatization under homogeneous solution conditions, J POL SC PC, 37(19), 1999, pp. 3738-3744
Citations number
26
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
Rate constants and activation parameters for decrystallization of Avicel PH
-101 cellulose, and bagasse-based cellulose in presence of LiCl/N,N-dimethy
lacetamide solvent system have been determined from dependence of the index
of crystallinity of cellulose, Ic, on time, under nonisothermal conditions
. Calculated rate constants and activation parameters are negligibly depend
ent on the degree of polymerization of the natural polymer. Under experimen
tal conditions used, derivatization of cellulose can be started after 3 h o
f cellulose-solvent contact. The relevance of our results to the industrial
application of derivatization under homogeneous solution conditions is dis
cussed. (C) 1999 John Wiley & Sons, Inc.