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Issue 7, 2010
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Change in conformation of polymerPFO on addition of multiwall carbon nanotubes

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Abstract

Multiwall carbon nanotubes (MWNTs) have been added to the polymer poly (9,9-dioctylfluorenyl-2, 7-diyl) end capped with dimethylphenyl (PFO) in various weight percentages and the blends thus prepared, using a solution processing approach, have been characterized using SEM, UV-VIS spectroscopy, PL spectroscopy and IV characterization. The SEM micrographs show a change in the structure of the polymer from partially crystalline to a glassy state in the blend form. The morphology observations are supported by absorption spectra which show a very high diminution of the polymers' beta peak in the spectra obtained from the polymernanotube blend. Thus, multiwall carbon nanotubes modify the local nanoscopic structure of PFO leading to a more glassy structure instead of a partially crystalline form and provide a method to tailor the conformation of polymer PFO, depending on intended application. IV characteristics reveal an increase in current on formation of the polymernanotube blend as compared to the polymer-only structure. On the basis of percolation theory, as applied to these polymernanotube blends, a percolation threshold value of 0.45 wt% and critical exponent value of 1.84 has been obtained, indicating the formation of a three dimensional polymernanotube network.

Graphical abstract: Change in conformation of polymer PFO on addition of multiwall carbon nanotubes

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Article information


Submitted
02 Jan 2010
Accepted
03 Mar 2010
First published
21 May 2010

Nanoscale, 2010,2, 1171-1177
Article type
Paper

Change in conformation of polymer PFO on addition of multiwall carbon nanotubes

M. Bansal, R. Srivastava, C. Lal, M. N. Kamalasanan and L. S. Tanwar, Nanoscale, 2010, 2, 1171
DOI: 10.1039/C0NR00001A

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