Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/6826
Title: Homogeneous crystallization and local dynamics of poly(ethylene oxide) (PEO) confined to nanoporous alumina
Authors: Suzuki, Yasuhito
Duran, Hatice
Steinhart, Martin
Butt, Hans-Juergen
Floudas, George
Keywords: [No Keywords]
Issue Date: 2013
Publisher: Royal Soc Chemistry
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 alpha relaxation process and the secondary beta process. Dielectric loss peaks become broader with decreasing pore diameter.
URI: https://doi.org/10.1039/c2sm27618f
https://hdl.handle.net/20.500.11851/6826
ISSN: 1744-683X
1744-6848
Appears in Collections:Malzeme Bilimi ve Nanoteknoloji Mühendisliği Bölümü / Department of Material Science & Nanotechnology Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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