CAS OpenIR  > 中科院上海应用物理研究所2011-2019年
Evolution of the microstructure and morphology of polyimide fibers during heat-drawing process
Dong, J; Yin, CQ; Lin, JY; Zhang, DB; Zhang, QH; qhzhang@dhu.edu.cn
2014
Source PublicationRSC ADVANCES
ISSN2046-2069
Volume4Issue:84Pages:44666—44673
AbstractThe development of crystalline structure and morphology for polyimide (PI) fibers in the heat-drawing process was investigated by simultaneous synchrotron wide-angle X-ray diffraction (WAXD) and small-angle X-ray scattering (SAXS). WAXD results indicated that the drawing process resulted in a high crystal orientation and ordered crystal structure. Especially, as the drawing ratio increases to 2.0, a well-defined crystalline structure forms in the fibers. We propose that the highly oriented molecular chains induce the formation of crystalline regions. Namely, an orientation-induced crystallization occur with stretching in the case of the heat-drawing polyimide fibers. The meridional scattering streaks in the SAXS patterns for the as-spun fibers suggest the presence of periodic lamellar structure in the fibers. These crystalline lamellae may evolve to more complete crystalline regions. The size of microvoids in the cross-section of the PI fibers is analyzed by SAXS. As a result, the drawing process leads to the orientation of microvoids along the fiber, and to reduced diameter of the microvoids in the fiber. Dynamic thermomechanical analysis indicates that the activation energy E-a of alpha relaxation increases with the increase in the crystallinity and orientation in the fibers.
KeywordRegenerated Cellulose Fibers High-performance Fibers X-ray-scattering Mechanical-properties Films Deformation Polymers
Indexed BySCI
Language英语
WOS IDWOS:000342993800049
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/14124
Collection中科院上海应用物理研究所2011-2019年
Corresponding Authorqhzhang@dhu.edu.cn
Recommended Citation
GB/T 7714
Dong, J,Yin, CQ,Lin, JY,et al. Evolution of the microstructure and morphology of polyimide fibers during heat-drawing process[J]. RSC ADVANCES,2014,4(84):44666—44673.
APA Dong, J,Yin, CQ,Lin, JY,Zhang, DB,Zhang, QH,&qhzhang@dhu.edu.cn.(2014).Evolution of the microstructure and morphology of polyimide fibers during heat-drawing process.RSC ADVANCES,4(84),44666—44673.
MLA Dong, J,et al."Evolution of the microstructure and morphology of polyimide fibers during heat-drawing process".RSC ADVANCES 4.84(2014):44666—44673.
Files in This Item: Download All
File Name/Size DocType Version Access License
Evolution of the mic(1654KB) 开放获取CC BY-NC-SAView Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Dong, J]'s Articles
[Yin, CQ]'s Articles
[Lin, JY]'s Articles
Baidu academic
Similar articles in Baidu academic
[Dong, J]'s Articles
[Yin, CQ]'s Articles
[Lin, JY]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Dong, J]'s Articles
[Yin, CQ]'s Articles
[Lin, JY]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Evolution of the microstructure and morphology of polyimide fibers during heat-drawing process.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.