The formation of polyacrylonitrile nascent fibers in wet-spinning process

The formation of polyacrylonitrile (PAN) nascent fibers in wet‐spinning process was studied by KMnO4 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. W...

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Bibliographic Details
Published in:Journal of applied polymer science 2007-10, Vol.106 (1), p.692-696
Main Authors: Chen, Juan, Ge, He-Yi, Dong, Xing-Guang, Wang, Cheng-Guo
Format: Article
Language:English
Subjects:
Applied sciences
coagulation bath
Exact sciences and technology
Fibers and threads
Forms of application and semi-finished materials
nascent fiber
PAN
Polymer industry, paints, wood
structure
Technology of polymers
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Summary:The formation of polyacrylonitrile (PAN) nascent fibers in wet‐spinning process was studied by KMnO4 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
ISSN:0021-8995
1097-4628
DOI:10.1002/app.26700