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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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Publication details

The article was received on 13 Nov 2012, accepted on 19 Dec 2012 and first published on 11 Jan 2013


Article type: Paper
DOI: 10.1039/C2SM27618F
Citation: Soft Matter, 2013,9, 2621-2628
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    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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