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High‐strength poly( L ‐lactide) fibers by a dry‐spinning/hot‐drawing process. II. Influence of the extrusion speed and winding speed on the dry‐spinning process
Author(s) -
Postema A. R.,
Luiten A. H.,
Oostra H.,
Pennings A. J.
Publication year - 1990
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.1990.070390606
Subject(s) - spinning , extrusion , materials science , composite material , rotational speed , fiber , melt spinning , crystallization , process (computing) , mechanical engineering , chemical engineering , computer science , engineering , operating system
This paper is concerned with the influences of the extrusion speed and the winding speed during dry spinning of 4 wt % solutions of poly( L ‐lactide) (PLLA) in mixtures of chloroform and toluene, on the ultimate fiber tenacities after hot drawing. It was found that high‐strength PLLA fibers (1.5 GPa) can be produced at high spinning rates (> 180 m/min) if rupturing of the entanglement network and oriented crystallization during spinning is suppressed. This could be accomplished by avoiding spinline stretching and applying low elongational deformation rates in the spinneret during spinning.