Investigation of Voids in Polyacrylonitrile Fibers by USAXS and SAXS

The void structure of polyacrylonitrile(PAN) fibers was investigated using ultra-small angle X-ray scat-tering(USAXS) and small angle X-ray scattering(SAXS). A quantitative method was developed to analyze connected USAXS/SAXS data and thus determine the void parameters of PAN fibers. The results sho...

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Bibliographic Details
Published in:Chemical research in Chinese universities 2019-12, Vol.35 (6), p.1070-1075
Main Authors: Tang, Haitong, Meng, Fanling, Liu, Yan, Jin, Shi, Wang, Xiaodong, Gao, Zhongmin, Che, Xiaolei
Format: Article
Language:English
Subjects:
Analytical Chemistry
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Inorganic Chemistry
Organic Chemistry
Physical Chemistry
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Summary:The void structure of polyacrylonitrile(PAN) fibers was investigated using ultra-small angle X-ray scat-tering(USAXS) and small angle X-ray scattering(SAXS). A quantitative method was developed to analyze connected USAXS/SAXS data and thus determine the void parameters of PAN fibers. The results showed that voids affected the mechanical performance of PAN fibers and were present throughout the entire wet-spinning process. When the abso-lute quantity and size of voids decreased, the tensile strength and modulus of PAN fibers increased. The void para-meters were optimized by controlling the production process, and thus the tensile strength and modulus of PAN fibers were increased. The method for analyzing the void structure developed in this study is useful for analyzing voids over with larger size range, as well as the effect of the void structure on the mechanical performance of fibers.
ISSN:1005-9040
2210-3171
DOI:10.1007/s40242-019-9202-6