Chapter

Biodegradable poly(butylene succinate)/multi-walled carbon nanotube nanocomposites

Y. F. Shih and R. J. Jeng

in Nanocomposites with Biodegradable Polymers

Published in print April 2011 | ISBN: 9780199581924
Published online September 2011 | e-ISBN: 9780191728853 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780199581924.003.0005

Series: Monographs on the Physics and Chemistry of Materials

Biodegradable poly(butylene succinate)/multi-walled carbon nanotube nanocomposites

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CNTs have been successfully modified by using DCC dehydrating agents. The modified CNTs, i.e. the CNT-C18 sample could be well dispersed in organic solvents, and incorporated into the PBS matrices through simple melt-blending. The PBS/CNT-C18 nanocomposites exhibited not only a good dispersion of nanotubes in the PBS matrices, but an improvement in mechanical and electrical properties as well. The increment of E' and E” of the nanocomposite at 25°C were achieved up to the levels of 120% and 55%, respectively, as compared with the neat PBS sample. Moreover, a decrease of over 109 fold in value of the electrical resistivity and excellent anti-static capacity were found for the composite with 3wt % CNT-C18. Thermal degradation analysis reveals that the reaction mechanism of PBS was not significantly changed by the addition of CNTs. The degradation reaction mechanism of PBS and the CNT-C18 containing nanocomposites at lower temperatures was likely to be the F1 model through reaction of random chain cleavage (cis-elimination). Conversely, the results indicate that the diffusion effect became more important in the thermal degradation of the samples at higher temperatures and there was a greater likelihood that the reaction mechanism resembled the D1 model. It is important to note that the characteristics of excellent heat and electrical conductivity of CNTs might lead to the smaller activation energies for the 1.5 and 3.0 wt% CNT-C18-containing nanocomposites as compared with that for 0.5 wt% CNT-C18.

Keywords: carbon nanotubes; dehydrating agent; melt blending; dispersion electrical resistivity

Chapter.  8889 words.  Illustrated.

Subjects: Condensed Matter Physics

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