Effect of confinement on polymer segmental motion and ion mobility in PEO/layered silicate nanocomposites

M. M. Elmahdy; K. Chrissopoulou; A. Afratis; G. Floudas; S. H. Anastasiadis

doi:10.1021/ma0608368

Effect of confinement on polymer segmental motion and ion mobility in PEO/layered silicate nanocomposites

M. M. Elmahdy, K. Chrissopoulou, A. Afratis, G. Floudas, S. H. Anastasiadis

Research output: Contribution to journal › Review article › peer-review

183 Scopus citations

Abstract

The role of nanoconfinement on both the polymer and the cation dynamics utilizing intercalated polymer/layered silicate nanocomposites was investigated. The segmental motion of poly(methylphenylsiloxane), PMPS in intercalated nanocomposites with PMPS confined within the 1.5-2.0 nm spacing between organically modified silicates was observed by dielectric spectroscopy. Very fast dynamics was observed in confinement with a weak, yet non-Arrhenius temperature dependence that extends well below the bulk polymer temperature. Quadrupole spin-echo ²H NMR on polystyrene/organosilicate hybrids showed a wide distribution of relaxation times. The Si-H cross-polarization NMR attributed the fast relaxations to segments located near the middle of the 2 nm layer. The confinement results in a speed-up of the PEO segmental relaxation dynamics which display an Arrhenius temperature dependence and persist for temperatures much lower than the bulk temperature.

Original language	English
Pages (from-to)	5170-5173
Number of pages	4
Journal	Macromolecules
Volume	39
Issue number	16
DOIs	https://doi.org/10.1021/ma0608368
State	Published - 8 Aug 2006
Externally published	Yes

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title = "Effect of confinement on polymer segmental motion and ion mobility in PEO/layered silicate nanocomposites",

abstract = "The role of nanoconfinement on both the polymer and the cation dynamics utilizing intercalated polymer/layered silicate nanocomposites was investigated. The segmental motion of poly(methylphenylsiloxane), PMPS in intercalated nanocomposites with PMPS confined within the 1.5-2.0 nm spacing between organically modified silicates was observed by dielectric spectroscopy. Very fast dynamics was observed in confinement with a weak, yet non-Arrhenius temperature dependence that extends well below the bulk polymer temperature. Quadrupole spin-echo 2H NMR on polystyrene/organosilicate hybrids showed a wide distribution of relaxation times. The Si-H cross-polarization NMR attributed the fast relaxations to segments located near the middle of the 2 nm layer. The confinement results in a speed-up of the PEO segmental relaxation dynamics which display an Arrhenius temperature dependence and persist for temperatures much lower than the bulk temperature.",

author = "Elmahdy, \{M. M.\} and K. Chrissopoulou and A. Afratis and G. Floudas and Anastasiadis, \{S. H.\}",

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T1 - Effect of confinement on polymer segmental motion and ion mobility in PEO/layered silicate nanocomposites

AU - Elmahdy, M. M.

AU - Chrissopoulou, K.

AU - Afratis, A.

AU - Floudas, G.

AU - Anastasiadis, S. H.

PY - 2006/8/8

Y1 - 2006/8/8

N2 - The role of nanoconfinement on both the polymer and the cation dynamics utilizing intercalated polymer/layered silicate nanocomposites was investigated. The segmental motion of poly(methylphenylsiloxane), PMPS in intercalated nanocomposites with PMPS confined within the 1.5-2.0 nm spacing between organically modified silicates was observed by dielectric spectroscopy. Very fast dynamics was observed in confinement with a weak, yet non-Arrhenius temperature dependence that extends well below the bulk polymer temperature. Quadrupole spin-echo 2H NMR on polystyrene/organosilicate hybrids showed a wide distribution of relaxation times. The Si-H cross-polarization NMR attributed the fast relaxations to segments located near the middle of the 2 nm layer. The confinement results in a speed-up of the PEO segmental relaxation dynamics which display an Arrhenius temperature dependence and persist for temperatures much lower than the bulk temperature.

AB - The role of nanoconfinement on both the polymer and the cation dynamics utilizing intercalated polymer/layered silicate nanocomposites was investigated. The segmental motion of poly(methylphenylsiloxane), PMPS in intercalated nanocomposites with PMPS confined within the 1.5-2.0 nm spacing between organically modified silicates was observed by dielectric spectroscopy. Very fast dynamics was observed in confinement with a weak, yet non-Arrhenius temperature dependence that extends well below the bulk polymer temperature. Quadrupole spin-echo 2H NMR on polystyrene/organosilicate hybrids showed a wide distribution of relaxation times. The Si-H cross-polarization NMR attributed the fast relaxations to segments located near the middle of the 2 nm layer. The confinement results in a speed-up of the PEO segmental relaxation dynamics which display an Arrhenius temperature dependence and persist for temperatures much lower than the bulk temperature.

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U2 - 10.1021/ma0608368

DO - 10.1021/ma0608368

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JO - Macromolecules

JF - Macromolecules

IS - 16

ER -

Effect of confinement on polymer segmental motion and ion mobility in PEO/layered silicate nanocomposites

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