Dielectric properties of montmorillonite clay filled poly(vinyl alcohol)/poly(ethylene oxide) blend nanocomposites

被引：127
作者：
Sengwa, R. J. [1 ]
Choudhary, Shobhna [1 ]
Sankhla, Sonu [1 ]
机构：
[1] Jai Narain Vyas Univ, Dept Phys, Dielect Res Lab, Jodhpur 342005, Rajasthan, India
来源：
COMPOSITES SCIENCE AND TECHNOLOGY | 2010年 / 70卷 / 11期
关键词：
Nanocomposites; Nanoclays; Polymers; Electrical properties; Dielectric spectroscopy; LAYERED SILICATE NANOCOMPOSITES; GLYCOL OLIGOMER BLENDS; POLY(ETHYLENE OXIDE); RELAXATION PROCESSES; POLY(ETHYLENEOXIDE)-POLY(VINYLALCOHOL) BLENDS; COLLOIDAL SUSPENSIONS; ELECTRICAL-PROPERTIES; IONIC-CONDUCTIVITY; DYNAMICS; COMPOSITES;
D O I：
10.1016/j.compscitech.2010.06.003
中图分类号：
TB33 [复合材料];
学科分类号：
摘要：
Organic-inorganic nanocomposites of poly(vinyl alcohol) (PVA)-poly(ethylene oxide) (PEO) blend filled with montmorillonite (MMT) nanoclay up to 10 wt.% concentration were synthesized by aqueous solution-cast technique. The complex dielectric function, electrical conductivity, electric modulus and impedance spectra of the nanocomposites were measured in the frequency range 20 Hz-1 MHz at ambient temperature. A direct correlation was observed between the real part of dielectric function and the mean relaxation time of the polymer chain segmental dynamics, with the exfoliated and intercalated MMT clay structures, and the extent of miscibility between PVA and PEO due to hydrogen bonded bridging through exfoliated MMT clay nanosheets. The large increase of dielectric relaxation time revealed that the dispersed exfoliated nanoscale MMT clay in the polymers blend matrix produces a large hindrance to the polymer chain dynamics. Results confirm that the real part of dielectric function of the nanocomposites can be tailored by varying amount of MMT clay filler for their use as nanodielectric materials in the microelectronic technology. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1621 / 1627
页数：7
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