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Nanocomposites with Biodegradable PolymersSynthesis, Properties, and Future Perspectives$
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Vikas Mittal

Print publication date: 2011

Print ISBN-13: 9780199581924

Published to Oxford Scholarship Online: September 2011

DOI: 10.1093/acprof:oso/9780199581924.001.0001

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

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

(p.101) 5 Biodegradable poly(butylene succinate)/multi-walled carbon nanotube nanocomposites
Nanocomposites with Biodegradable Polymers

Y. F. Shih

R. J. Jeng

Oxford University Press

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

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