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Chae, Han Gi
Polymer nano-composites and Carbon Fiber Laboratory (P&C Lab)
Research Interests
  • Polymer Physics/ Processing, Carbon Nano-materials, Ultra high performance/ multifuctional nano-composites, Smart textile/ fiber

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Temperature dependent tensile behavior of gel-spun polyacrylonitrile and polyacrylonitrile/carbon nanotube composite fibers

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Title
Temperature dependent tensile behavior of gel-spun polyacrylonitrile and polyacrylonitrile/carbon nanotube composite fibers
Author
Liu, YaodongChoi, YounghoChae, Han GiGulgunje, Prabhakar V.Kumar, Satish Naveen
Keywords
Constant strain rate; Increasing temperatures; Nanotube-composite fibers; Polyacrylonitrile (PAN); Polyacrylonitrile fiber; Structure evolution; Temperature dependent; Thermal transitions
Issue Date
2013-07
Publisher
ELSEVIER SCI LTD
Citation
POLYMER, v.54, no.15, pp.4003 - 4009
Abstract
Tensile properties of gel-spun polyacrylonitrile (PAN) and PAN/carbon nanotube (CNT) fibers were studied as a function of temperature from -100 C to 300 C at a constant strain rate of 0.01/s. Tensile strength and modulus values at low temperature were as high as 1.65 GPa and 44.4 GPa, respectively. The tensile strength and modulus of PAN fibers decreased with increasing temperature, while drawability dramatically increased in a narrow temperature window near α/αc transition temperature. Three transitions, namely γ, βc, and α/αc transitions were observed by dynamic mechanical analysis. The relationships between tensile properties and thermal transitions, the effect of the addition of CNT, and the structure evolution during the elongation at temperatures above the PAN α/αc transition were investigated. Understanding of the drawing behavior of PAN and PAN/CNT is important so the highest property carbon fibers can be processed from these fibers.
URI
https://scholarworks.unist.ac.kr/handle/201301/10333
DOI
10.1016/j.polymer.2013.05.051
ISSN
0032-3861
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MSE_Journal Papers
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