Confinement of C60 nanoparticles on the dynamics of polystyrene studied by anelastic spectroscopy and rheometrics

Fang, Zhengping and Shang, Shuying and Wang, Hao (2013) Confinement of C60 nanoparticles on the dynamics of polystyrene studied by anelastic spectroscopy and rheometrics. In: 4th International Conference on Smart Materials and Nanotechnology in Engineering (SMN 2013), 10-12 Jul 2013, Gold Coast, Australia.


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.

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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: © (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Print copy of the Proceedings held in the USQ Library at call no. 620.5 Fou.
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 24 Jan 2014 05:27
Last Modified: 15 Mar 2018 02:30
Uncontrolled Keywords: chain dynamics; confinement; fullerene; nanocomposites; polystyrene
Fields of Research : 09 Engineering > 0912 Materials Engineering > 091206 Glass
09 Engineering > 0904 Chemical Engineering > 090408 Rheology
10 Technology > 1007 Nanotechnology > 100708 Nanomaterials
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: 10.1117/12.2028373

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