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Citation: HUANG Senbiao, MA Xiaoye, GUO Haiquan, QIU Xuepeng, GAO Lianxun. Mechanical Property, Morphology and Structure of BPDA/PPD/OTOL Polyimide Fibers[J]. Chinese Journal of Applied Chemistry, ;2012, 29(8): 863-867. doi: 10.3724/SP.J.1095.2012.00386 shu

Mechanical Property, Morphology and Structure of BPDA/PPD/OTOL Polyimide Fibers

1.
a State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
2.
b Graduate School of Chinese Academy of Sciences, Beijing 100039, China

Corresponding author: GAO Lianxun,
Received Date: 2 September 2011
Available Online: 4 November 2011

After incorporating o-tolidine(OTOL) into 3,3',4,4'-biphenyltetracarboxylic dianhydride(BPDA) and p-phenylenediamine(PPD) backbone,the mechanical properties of fibers were dramatically improved.The strength and modulus of BPDA/PPD/OTOL polyimide(PI) fiber(diamine molar ratio of n(PPD):n(OTOL)=70: 30) attained 1.50 and 80 GPa,respectively,which were two times of the tenacity of BPDA/PPD PI fibers.SEM pictures showed that the cross-sections of the fibers at each stage were circular and voids free,and also no obvious "skin-core" and microfibrillar structure and wide/small angle X-ray scattering(WAXD/SAXS) experiments indicated that the longitudinal stacks and the molecular orientation of PI fiber were improved in the heat-drawn process.
- polyimide fiber,
- o-tolidine,
- SEM,
- wide angle X-ray diffraction,
- small angle X-ray scattering
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