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Please use this identifier to cite or link to this item: http://hdl.handle.net/1813/30452
Title: Crystallization and unusual rheological behavior in poly(ethylene oxide)-clay nanocomposites
Authors: Kelarakis, A.
Giannelis, E.P.
Keywords: Organoclays
Poly(ethylene oxide)
LAYERED SILICATE NANOCOMPOSITES
POLYMER-CLAY NANOCOMPOSITES
MELT INTERCALATION
COMPUTER-SIMULATION
LITHIUM BATTERIES
CARBON NANOTUBES
MONTMORILLONITE
MORPHOLOGY
ORGANOCLAY
ELECTROLYTES
Issue Date: 4-May-2011
Publisher: Elsevier
Citation: http://dx.doi.org/10.1016/j.polymer.2011.03.031
Abstract: We report a systematic study of the crystallization and theological behavior of poly(ethylene oxide) (PEO)-clay nanocomposites. To that end a series of nanocomposites based on PEOs of different molecular weight (10(3) < MW < 10(5) g/mol) and clay surface modifier was synthesized and characterized. Incorporation of organoclays with polar (MMT-OH) or aromatic groups (MMT-Ar) suppresses the crystallization of polymer chains in low MW PEO, but does not significantly affect the crystallization of high MW matrices. In addition, the relative complex viscosity of the nanocomposites based on low MW PEO increases significantly, but the effect is less pronounced at higher MWs. The viscosity increases in the series MMT-Alk < MMT-OH < MMT-Ar. In contrast to the neat PEO which exhibits a monotonic decrease of viscosity with temperature, all nanocomposites show an increase after a certain temperature. This is the first report of such dramatic enhancements in the viscoelasticity of nanocomposites, which are reversible, are based on a simple polymer matrix and are true in a wide temperature range. (C) 2011 Elsevier Ltd. All rights reserved.
Related Version: http://ac.els-cdn.com/S0032386111002370/1-s2.0-S0032386111002370-main.pdf?_tid=5ae5894c-124e-11e2-8d0d-00000aacb362&acdnat=1349814031_e7754bcdfac14dff3048867e8aff9e65
URI: http://hdl.handle.net/1813/30452
ISSN: 0032-3861
Appears in Collections:Energy and Sustainability Publications

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