a.Polymer Composites Engineering Laboratory, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
b.Academy of Space Electronic Information Technology, Xi'an 710100, China
Xue-peng Qiu(邱雪鹏),E-mail:xp_q@ciac.ac.cn
收稿:2016-05-03,
修回:2016-6-14,
录用:2016-7-6,
纸质出版:2016-11
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Zhi-xin Dong, Tao Feng, Chao Zheng, 等. Mechanical Properties of Polyimide/Multi-walled Carbon Nanotube Composite Fibers[J]. Chinese Journal of Polymer Science, 2016,34(11):1386-1395.
Zhi-xin Dong, Tao Feng, Chao Zheng, et al. Mechanical Properties of Polyimide/Multi-walled Carbon Nanotube Composite Fibers[J]. Chinese Journal of Polymer Science, 2016, 34(11): 1386-1395.
Zhi-xin Dong, Tao Feng, Chao Zheng, 等. Mechanical Properties of Polyimide/Multi-walled Carbon Nanotube Composite Fibers[J]. Chinese Journal of Polymer Science, 2016,34(11):1386-1395. DOI: 10.1007/s10118-016-1841-1.
Zhi-xin Dong, Tao Feng, Chao Zheng, et al. Mechanical Properties of Polyimide/Multi-walled Carbon Nanotube Composite Fibers[J]. Chinese Journal of Polymer Science, 2016, 34(11): 1386-1395. DOI: 10.1007/s10118-016-1841-1.
A series of polyimide (PI)/multi-walled carbon nanotube (MWCNT) composite fibers were prepared by copolymerizing a mixture of monomers and carboxylic-functionalized MWCNTs
followed by dry-jet wet spinning
thermal imidization
and hot-drawing process. The content of the carboxylic groups of MWCNTs significantly increased when treated with mixed acid
whereas their length decreased with treatment time. Both the carboxylic content and length of MWCNTs influenced the mechanical properties of the composite fibers. Fiber added with 0.1 wt% MWCNTs treated for 4 h exhibited the best mechanical properties
i.e
.
1.4 GPa tensile strength and 14.30% elongation at break
which were 51% and 32% higher than those of pure PI fibers
respectively. These results indicated that a suitable MWCNT content strengthened and toughened the resultant PI composite fibers
simultaneously. Moreover
raising draw ratio resulted in the increase of tensile strength and tensile modulus of the composite fibers.
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