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The formation of polyacrylonitrile nascent fibers in wet‐spinning process
Author(s) -
Chen Juan,
Ge HeYi,
Dong XingGuang,
Wang ChengGuo
Publication year - 2007
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.26700
Subject(s) - polyacrylonitrile , spinning , scanning electron microscope , materials science , coagulation , composite material , transverse plane , impurity , polymer chemistry , chemical engineering , chemistry , polymer , anatomy , organic chemistry , medicine , psychology , psychiatry , engineering
The formation of polyacrylonitrile (PAN) nascent fibers in wet‐spinning process was studied by KMnO 4 back titration method and scanning electron microscopy (SEM). It has been found that the rate of DMSO diffusion was rapid at the beginning of coagulation then decreased and reached balance at 24 s. With coagulation time increase, the nascent fibers became denser and had fewer inner defects gradually, but transverse stripes appeared on the surface at 24 s, and got deeper. The main defects of nascent fibers included transverse stripes, impurity, fish tail, inner microvoids etc. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007