1. Nanoscale dynamic mechanical imaging of the skin–core difference: From PAN precursors to carbon fibers
- Author
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Ruigang Liu, Jian Xu, Haixia Dong, Caizhen Zhu, Ning Zhao, Yizhuo Gu, Zuoguang Zhang, Jing Guo, Liu Qianli, and Xiaofang Liu
- Subjects
Materials science ,Mechanical Engineering ,Polyacrylonitrile ,Modulus ,Dynamic mechanical analysis ,Condensed Matter Physics ,Microstructure ,Skin core ,Cross section (geometry) ,chemistry.chemical_compound ,chemistry ,Mechanics of Materials ,General Materials Science ,Composite material ,Nanoscopic scale - Abstract
In this study, nanoscale dynamic mechanical imaging was used to map the storage modulus along the cross section of fibers during the evolution from polyacrylonitrile (PAN) precursors to carbon fibers. The quantitative characterization of skin–core difference in oxidative stabilized fibers indicated that the primary skin–core structure in the fibers forms at 265 °C and the skin–core difference of the final oxidative stabilized fibers in modulus was about 8%. The difference has been enhanced in modulus but reduced in spatial scale during the transition from stabilized PAN fibers to carbon fibers.
- Published
- 2014
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