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Confinement Effects on The Local Motion in Nanocomposites

Published online by Cambridge University Press:  10 February 2011

S. H. Anastasiadis ,
K. Karatasos ,
G. Vlachos ,
E. Manias  and
E. P. Giannelis
S. H. Anastasiadis
Affiliation:
Foundation for Research and Technology-Hellas, Institute of Electronic Structure and Laser, P. 0. Box 1527, 71110 Heraklion, Crete, Greece
K. Karatasos
Affiliation:
Foundation for Research and Technology-Hellas, Institute of Electronic Structure and Laser, P. 0. Box 1527, 71110 Heraklion, Crete, Greece
G. Vlachos
Affiliation:
Foundation for Research and Technology-Hellas, Institute of Electronic Structure and Laser, P. 0. Box 1527, 71110 Heraklion, Crete, Greece
E. Manias
Affiliation:
Cornell University, Department of Materials Science and Engineering, Ithaca, NY 14853, U.S.A.
E. P. Giannelis
Affiliation:
Cornell University, Department of Materials Science and Engineering, Ithaca, NY 14853, U.S.A.
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Abstract

The local segmental dynamics of polymers confined within the 15–20 Å interlayer spacing of nanocomposites consisting of poly(methyl phenyl siloxane) intercalated within organically modified silicates, has been investigated utilizing Dielectric Relaxation Spectroscopy. The effect of confinement on the local reorientational dynamics is evident by the observation of a relaxation mode, which is much faster than the segmental α-relaxation of the bulk polymer and exhibits much weaker temperature dependence. This is attributed to the restrictions placed by the interlayer spacing on the cooperative volume required for the ax-relaxation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 543: Symposium W – Dynamics in Small Confining Systems IV , 1998 , 125
Copyright
Copyright © Materials Research Society 1999

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