Influence of boric acid on radial structure of oxidized polyacrylonitrile fibers

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Abstract: The surface modification of polyacrylonitrile (PAN) fibers with boric acid was utilized to modulate the homogeneity of the radial structure of the PAN fibers during thermal stabilization. Exothermic peaks of the fibers were put off by boric acid, and unreacted nitrile groups of the oxidized PAN fibers increased with the boron content, indicating that boric acid on the fiber surface had an retardant effect on the thermal stabilization of PAN fibers. The relative skin thicknesses of the oxidized PAN fibers were quantitatively measured by sulfuric acid etching and SEM observation. The value increased obviously with the boron content, which could be further elevated by increasing stabilization time or decreasing stabilization temperature. Oxidized PAN fibers with more homogeneous radial structure can thus be obtained with the modification of boric acid, which might be beneficial for the preparation of high performance carbon fibers.

Location: Deutsche Nationalbibliothek Frankfurt am Main

Extent: Online-Ressource

Language: Englisch

Bibliographic citation: Influence of boric acid on radial structure of oxidized polyacrylonitrile fibers ; volume:19 ; number:1 ; year:2019 ; pages:79-86 ; extent:8
e-Polymers ; 19, Heft 1 (2019), 79-86 (gesamt 8)

Creator: Wang, Xue-Fei
Zhu, Xiao-Long
Jiang, Chi
Guan, Jian-Min
Qian, Xin
Song, Shu-Lin
Zhang, Yong-Gang
Li, De-Hong

DOI: 10.1515/epoly-2019-0010

URN: urn:nbn:de:101:1-2412151604256.119996489444

Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.

Last update: 15.08.2025, 7:37 AM CEST

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Wang, Xue-Fei
Zhu, Xiao-Long
Jiang, Chi
Guan, Jian-Min
Qian, Xin
Song, Shu-Lin
Zhang, Yong-Gang
Li, De-Hong

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Influence of boric acid on radial structure of oxidized polyacrylonitrile fibers

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Other Objects (12)

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