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Preparation and characterization of poly(methyl methacrylate)/multi-walled carbon nanotube composites
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Kumar, Sandeep, Rath, T., Khatua, B. B., Dhibar, A. K. and Das, C. K. (2009) Preparation and characterization of poly(methyl methacrylate)/multi-walled carbon nanotube composites. Journal of Nanoscience and Nanotechnology, 9 (8). pp. 4644-4655. doi:10.1166/jnn.2009.220 ISSN 1533-4880.
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Official URL: http://dx.doi.org/10.1166/jnn.2009.220
Abstract
This paper focuses on the preparation and characterization of Poly(methyl methacrylate)/multi-walled carbon nanotube composites through ex-situ and in-situ processes. The extent of dispersion and fracture morphology was studied by TEM, AFM, SEM and FESEM. The increase in conductivity at percolated loading of 2.91 wt% was more for in-situ prepared PMMA/MWNTs nanocomposite as compared to ex-situ prepared nanocomposites. The dielectric constant of pure PMMA was increased from 5 to 72 in the ex-situ prepared PMMA/MWNTs nanocomposites with 4.76 wt% of MWNTs loading. Moreover, for the ex-situ nanocomposites containing 2.91 wt% of MWNTs, the dielectric constant was 15, but in-situ prepared PMMA/MWNTs nanocomposite showed two times increase at same loading of 2.91 wt% of MWNTs. Dielectric constant of PMMA/MWNTs nanocomposites loaded with (<4.76 wt%) of MWNTs remained almost constant with frequency. Dynamic mechanical analysis showed remarkable increase in storage modulus, especially at higher temperatures with 4.76 wt% loading of carbon nanotubes as compared to pure PMMA. The presence of additional peak before T g indicated that CNTs could be used to wake up secondary relaxations, which were inactive in pure PMMA. Thermogravimetric analysis (TGA) showed that thermal stability of PMMA/MWNTs nanocomposites increased by 45 °C (in N2) and 27 °C (in air) at 4.76 wt% of MWNTs as compared to the pure PMMA.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||
Journal or Publication Title: | Journal of Nanoscience and Nanotechnology | ||||
Publisher: | American Scientific Publishers | ||||
ISSN: | 1533-4880 | ||||
Official Date: | 1 August 2009 | ||||
Dates: |
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Volume: | 9 | ||||
Number: | 8 | ||||
Page Range: | pp. 4644-4655 | ||||
DOI: | 10.1166/jnn.2009.220 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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