a.Shanghai Collaborative Innovation Center for High Performance Fiber Composites, Engineering Research Center of Technical Textiles, Ministry of Education, Donghua University, Shanghai 201620, China
b.Jiangsu Aoshen Hi-Tech Materials Co., Ltd., Lianyungang 222000, China
dj01@dhu.edu.cn (J.D.)
qhzhang@dhu.edu.cn (Q.H.Z.)
收稿:2020-08-26,
修回:2020-9-8,
录用:2020-9-14,
网络首发:2020-10-13,
纸质出版:2021-01-01
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Zheng, S. S.; Dong, H.; Wang, S. H.; Dong, J.; Guo, T.; Zhao, X.; Zhang, Q. H. Scalable reaction-spinning of rigid-rod Upilex-S® type polyimide fiber with an ultrahigh , T,g. Chinese J. Polym. Sci. 2021, 39, 592–600 DOI: 10.1007/s10118-021-2508-0.
Sen-Sen Zheng, Han Dong, Shi-Hua Wang, et al. Scalable Reaction-spinning of Rigid-rod Upilex-S® Type Polyimide Fiber with an Ultrahigh
Zheng, S. S.; Dong, H.; Wang, S. H.; Dong, J.; Guo, T.; Zhao, X.; Zhang, Q. H. Scalable reaction-spinning of rigid-rod Upilex-S® type polyimide fiber with an ultrahigh , T,g. Chinese J. Polym. Sci. 2021, 39, 592–600 DOI: 10.1007/s10118-021-2508-0. DOI:
Sen-Sen Zheng, Han Dong, Shi-Hua Wang, et al. Scalable Reaction-spinning of Rigid-rod Upilex-S® Type Polyimide Fiber with an Ultrahigh
In the family of polyimide (PI) materials
Upilex-S
®
film has been a shining star through the research PI materials due to its appealing merits. Unfortunately
the wholly rigid-rod backbone and easily formed skin-core micromorphology and microvoids of Upilex-S
®
type PI lead to the high difficulty in melt- and wet-spinning fabrication. Herein
we propose a facile and scalable method
reaction-spinning
to fabricate the Upilex-S
®
type PI fiber
in which the rapid solidification of spinning dope and partial imidization take place simultaneously. Thus
the stability and mechanical strength of as-spun fibers can be improved
and the microvoids in fibers can be greatly reduced in relative to the wet-spun fibers. The resultant Upilex-S
®
type PI fiber shows higher tensile strength and modulus than most commercial thermal-oxidative polymeric fibers with an ultrahigh glass transition temperature
T
g
of 478 °C. Moreover
the WAXS and SAXS results indicate that orthorhombic crystals are formed for Upilex-S
®
type PI fiber in the post hot-drawing process. Increasing the hot-drawing temperature results in a continuous crystallization and high orientation of PI chains in amorphous phase and perfects the existing lamellar structure
which make a great contribution to the improved mechanical property.
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