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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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Carbon nanotube dispersion and exfoliation in polypropylene and structure and properties of the resulting composites

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Title
Carbon nanotube dispersion and exfoliation in polypropylene and structure and properties of the resulting composites
Author
Lee, Geon-WoongJagannathan, SudhakarChae, Han GiMinus, Marilyn L.Kumar, Satish
Keywords
Carbon nanotubes; Dispersion; Polypropylene
Issue Date
2008-04
Publisher
ELSEVIER SCI LTD
Citation
POLYMER, v.49, no.7, pp.1831 - 1840
Abstract
Nitric acid treated single and multi wall carbon nanotubes (SWNT and MWNT) have been dispersed in polypropylene using maleic anhydride grafted polypropylene (MA-g-PP) and butanol/xylene solvent mixture. SWNT exfoliation was characterized by Raman and UV-vis-NIR spectroscopies. Evidence for hydrogen bonding between maleic anhydride grafted polypropylene and nitric acid treated nanotubes was obtained using infrared spectroscopy. Polypropylene/carbon nanotube composites were melt-spun into fibers. Dynamic mechanical studies show that for fibers containing 0.1 wt% SWNT, storage modulus increased by 5 GPa at -140 °C and by about 1 GPa at 100 °C, suggesting temperature dependent interfacial strength. The crystallization behavior has been monitored using differential scanning calorimetry and optical microscopy. Control fibers exhibited 27% shrinkage at 160 °C, while the shrinkage in the composite fibers was less than 5%. Fibers heat-treated to 170 °C show very narrow polypropylene melting peak (peak width about 1 °C). ⓒ 2008 Elsevier Ltd. All rights reserved.
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DOI
10.1016/j.polymer.2008.02.029
ISSN
0032-3861
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MSE_Journal Papers
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