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

被引：104
作者：
Suzuki, Yasuhito [1 ]
Duran, Hatice [2 ]
Steinhart, Martin [3 ]
Butt, Hans-Juergen [1 ]
Floudas, George [4 ]
机构：
[1] Max Planck Inst Polymer Res, D-55128 Mainz, Germany
[2] TOBB Univ Economins & Technol, Dept Mat & Nanotechnol Eng, TR-06560 Ankara, Turkey
[3] Univ Osnabruck, Inst Chem Mat, D-49069 Osnabruck, Germany
[4] Univ Ioannina, Dept Phys, GR-45110 Ioannina, Greece
来源：
SOFT MATTER | 2013年 / 9卷 / 09期
关键词：
THERMOSETTING POLYMER BLENDS; ANODIC POROUS ALUMINA; KINETICS; TEMPERATURE; MISCIBILITY; DEPENDENCE; RESIN;
D O I：
10.1039/c2sm27618f
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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.
引用
收藏
页码：2621 / 2628
页数：8
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