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Issue 9, 2013
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Homogeneous crystallization and local dynamics of poly(ethylene oxide) (PEO) confined to nanoporous alumina

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Abstract

The crystallization of poly(ethylene oxide) (PEO) confined in self-ordered nanoporous alumina (AAO) containing aligned and straight cylindrical nanopores was studied as a function of molecular weight, pore size and cooling/heating rate by differential scanning calorimetry and X-ray scattering. Bulk PEO crystallizes via heterogeneous nucleation at defects and impurities whereas PEO confined to AAO crystallizes mainly via homogeneous nucleation. Molecular weight and cooling rate have a pronounced effect on the nucleation process. Dielectric spectroscopy revealed that confining PEO to AAO results in broadening of the distribution of relaxation times associated with the segmental α relaxation process and the secondary β process. Dielectric loss peaks become broader with decreasing pore diameter.

Graphical abstract: Homogeneous crystallization and local dynamics of poly(ethylene oxide) (PEO) confined to nanoporous alumina

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Supplementary files

Article information


Submitted
13 Nov 2012
Accepted
19 Dec 2012
First published
11 Jan 2013

Soft Matter, 2013,9, 2621-2628
Article type
Paper

Homogeneous crystallization and local dynamics of poly(ethylene oxide) (PEO) confined to nanoporous alumina

Y. Suzuki, H. Duran, M. Steinhart, H. Butt and G. Floudas, Soft Matter, 2013, 9, 2621
DOI: 10.1039/C2SM27618F

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