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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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Solid-State NMR Study of Spin Finish of Thermally Treated PAN and PAN/CNT Precursor Fibers

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Title
Solid-State NMR Study of Spin Finish of Thermally Treated PAN and PAN/CNT Precursor Fibers
Author
Ghoshal, SushantaLiu, YaodongGulgunje, PrabhakarGupta, KishorChae, Han GiLeisen, JohannesKumar, Satish
Keywords
fibers; nanotubes; spectroscopy; textiles
Issue Date
2014-09
Publisher
WILEY-BLACKWELL
Citation
JOURNAL OF APPLIED POLYMER SCIENCE, v.131, no.17, pp.1 - 9
Abstract
Dry-jet wet-spun polyacrylonitrile (PAN) and PAN/carbon nanotubes (CNTs) precursor fibers coated by spin finishes were characterized using the solid-state H-1 nuclear magnetic resonance technique. Series of fiber samples were prepared upon thermal treatment at different temperatures (room temperature to 180 degrees C). Using the Hahn echo sequence, relatively mobile components were identified and the effect of the heat treatment on those components was studied. It was observed that the mobile components are mainly the spin finishes. Heat treatment caused loss of one of the spin finishes (Type B) to a great extent (similar to 80%), whereas the other two spin finishes (Type A and Type C) were more stable. Additional information regarding the change in molecular mobility due to heat treatment was obtained by the spin-lattice relaxation time (T-1) analysis. It was found that the presence of CNT affects the T-1 relaxation time of the polymer in the composite fiber, however, that of relatively mobile components remains unaffected. (C) 2014 Wiley Periodicals, Inc
URI
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DOI
10.1002/app.40734
ISSN
0021-8995
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MSE_Journal Papers
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