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Investigations on the structure of regenerated cellulose fibers; Herrn Professor Janeschitz‐Kriegl zum 70. Geburtstag mit den besten Wünschen gewidmet
Author(s) -
Schurz Josef,
Lenz Jürgen
Publication year - 1994
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19940830123
Subject(s) - lyocell , viscose , spinning , materials science , cellulose , crystallite , fiber , regenerated cellulose , cellulose fiber , composite material , amorphous solid , polymer science , polymer chemistry , chemical engineering , crystallography , chemistry , engineering , metallurgy
A review is given on comparative investigations onto the structure of regenerated cellulose fibers of the regular viscose type (modal) and of solvent spun fibers of the lyocell type, namely the NMMO fiber spun from a solution of cellulose in N–methylmorpholine N–oxide and water. It was found that in the lyocell fiber the mechanical properties in the wet state detoriate less. This is explained by an increased length of the crystallites, less clustering of the crystalline regions, and a shorter and better oriented amorphous portion. These structural features could be caused by a different spinning mechanism due to a preordered spinning solution in which the stiff complexed cellulose molecules are oriented lengthwise in the spinning direction. This will greatly facilitate their orientation during fiber formation in the elongtional deformation velocity field of the draw down zone.