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Complex dynamics in polymer nanocomposites

Srivastava, S and Kandar, AK and Basu, JK and Mukhopadhyay, MK and Lurio, LB and Narayanan, S and Sinha, SK (2009) Complex dynamics in polymer nanocomposites. In: Physical Review E, 79 (2, Par).

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Abstract

Polymer nanocomposites offer the potential to create a new type of hybrid material with unique thermal, optical, or electrical properties. Understanding their structure, phase behavior, and dynamics is crucial for realizing such potentials. In this work we provide an experimental insight into the dynamics of such composites in terms of the temperature, wave vector, and volume fraction of nanoparticles, using multispeckle synchrotron x-ray photon correlation spectroscopy measurements on gold nanoparticles embedded in polymethylmethacrylate. Detailed analysis of the intermediate scattering functions reveals possible existence of an intrinsic length scale for dynamic heterogeneity in polymer nanocomposites similar to that seen in other soft materials like colloidal gels and glasses.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to The American Physical Society.
Keywords: differential scanning calorimetry;gold;nanocomposites;nanoparticles;photon correlation spectroscopy;polymers; X-ray spectra.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 30 Apr 2009 03:44
Last Modified: 19 Sep 2010 05:29
URI: http://eprints.iisc.ernet.in/id/eprint/19558

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