J. Phys. IV France 10 (2000) Pr7-255-Pr7-258
Local dynamics in nanocompositesS.H. Anastasiadis
Foundation for Research and Technology-Hellas, Institute of Electronic Structure and Laser, P. O. Box 1527, 71110 Heraklion, Crete, Greece, and University of Crete, Physics Depaetment, 71003 Heraklion, Crete, Greece
The local dynamics of 1.5-2.0 nm polymer films confined between parallel solid surfaces are investigated with dielectric spectroscopy in polymer/silicate intercalated nanocomposites. Confinement results in segmental dynamics which is much faster than the bulk-polymer [Math] -relaxation and exhibits a much weaker temperature dependence. This is discussed in relation to either the interlayer-spacing restricting the cooperative volume of the [Math]-relaxation or to the dominance of the more mobile interphase regions as predicted by simulations.
© EDP Sciences 2000