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Proceedings Paper

Confinement of C60 nanoparticles on the dynamics of polystyrene studied by anelastic spectroscopy and rheometrics
Author(s): Zhengping Fang; Shuying Shang; Hao Wang
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Paper Abstract

Anelastic spectroscopy and rheometrics were used to study the viscoelastic properties of polystyrene/C60 nanocomposites. 0.1 wt%, 0.5 wt%, 1 wt% and 2 wt% C60 were added to pure polystyrene via melt compounding. Both storage modulus and viscosity decreased obviously when 0.1 wt% C60 was added and it was ascribed to the increase of free volume around C60 nanoparticles. Both glass transition and liquid-liquid transition moved to high temperature, which was associated with the confinement effect of the nanoparticles. The addition of C60 influenced chain packing of polymer melts. The increase of free volume loosened the interaction between chain segments and nanoparticles on small size scale. So, the change of segment dynamics was not very obvious. On the contrary, the change of whole chain dynamics was very obvious. This can be explained by the fact that the influence coming from the increase of free volume was neglectable and the filler confinement of nanoparticles played an important role. The C60 nanoparticles were looked as attractors of the polymer chains, which divided the long chains into several segments leading to decrease the fragility of the nanocomposites.

Paper Details

Date Published: 9 August 2013
PDF: 10 pages
Proc. SPIE 8793, Fourth International Conference on Smart Materials and Nanotechnology in Engineering, 87930Y (9 August 2013); doi: 10.1117/12.2028373
Show Author Affiliations
Zhengping Fang, Zhejiang Univ. (China)
Shuying Shang, Zhejiang Univ. (China)
Hao Wang, Univ. of Southern Queensland (Australia)

Published in SPIE Proceedings Vol. 8793:
Fourth International Conference on Smart Materials and Nanotechnology in Engineering
Jayantha A. Epaarachchi; Alan Kin-tak Lau; Jinsong Leng, Editor(s)

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