Nanoscopic-confinement effects on local dynamics

S. H. Anastasiadis, K. Karatasos, G. Vlachos, E. Manias, E. P. Giannelis

Research output: Contribution to journalArticlepeer-review

283 Scopus citations

Abstract

The segmental dynamics of 1.5-2.0 nm polymer films confined between parallel solid surfaces is investigated with dielectric spectroscopy in polymer/silicate intercalated nanocomposites. The confinement effect is evident by the observation of a mode, much faster than the bulk-polymer α relaxation and exhibiting much weaker temperature dependence. This is discussed in relation to either the interlayer spacing restricting the cooperative volume of the α relaxation or to the dominance of the more mobile interphase regions as predicted by simulations; the data qualitatively support the former.

Original languageEnglish (US)
Pages (from-to)915-918
Number of pages4
JournalPhysical review letters
Volume84
Issue number5
DOIs
StatePublished - Jan 31 2000

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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