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X‐ray study of crystallinity and disorder in ramie fiber
Author(s) -
Sao K. P.,
Samantaray B. K.,
Bhattacherjee S.
Publication year - 1994
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.1994.070521203
Subject(s) - crystallinity , ramie , ultimate tensile strength , materials science , aqueous solution , cellulose , fiber , cellulose fiber , composite material , chemistry , chemical engineering , polymer chemistry , organic chemistry , engineering
The degree of crystallinity and the disorder parameter in ramie fibers treated with various concentrations of aqueous NaOH solutions at room temperature (∼ 30°C) and at 0°C, respectively, have been analyzed by the wide‐angle x‐ray diffraction method of Ruland and Vonk. 9–11 The results appear to suggest the presence of highly distorted crystalline regions that are first affected by lower concentrations of alkali. At higher concentrations of mercerizing strength it is observed that the lattice conversion to cellulose II is accompanied by a decrease in the degree of crystallinity and an increase in the disorder parameter values. The tensile properties of the fibers corroborate the results. © 1994 John Wiley & Sons, Inc.