AC/DC electrical conduction and dielectric properties of PMMA/PVAc/C <ce:inf loc='post'>60</ce:inf> down-shifting nanocomposite films
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首页> 外文期刊>Journal of Molecular Structure >AC/DC electrical conduction and dielectric properties of PMMA/PVAc/C 60 down-shifting nanocomposite films
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AC/DC electrical conduction and dielectric properties of PMMA/PVAc/C 60 down-shifting nanocomposite films

机译：PMMA / PVAC / C 60 DOWN-SHIFTING纳米复合膜的AC / DC导通和介电性能

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AbstractPolymer nanocomposite films were prepared by doping fullerene C60in polymer blend composed of polymethacrylate/polyvinyl acetate blends (PMMA/PVAc) using solution cast technique. The films were characterized by differential scanning calorimeter (DSC), Transmission electron microscope (TEM), DC/AC electrical conductivity and dielectric measurements in the frequency range (100?Hz- 1?MHz). The glass transition temperature,Tg, was increased by increasing the concentration of fullerene C60; this property reflects the increase of thermal stability by increasing the nanofiller content. The DC and AC electrical conductivities were enhanced by increasing C60concentration due to the electron hopping or tunneling between filled and empty localized states aboveTg. The relaxation time was determined from theαβ-relaxations and found to be attenuated by increasing the temperature as a typical behavior of amorphous polymers. The calculated values of thermodynamic parameters revealed the increase of molecular stability by increasing the doping concentration; this feature supports the application of PMMA/PVAc/C60nanocomposite films in a wide scale of solar energy conversion applications such as luminescent down-shifting (LDS) coatings for photovoltaic cells.展开▼
机译：<！[CDATA [ 抽象 通过掺杂富勒烯C 60 t g ，增加富勒烯C 60 ;该特性通过增加纳米填充物含量反映热稳定性的增加。通过增加C 浓度由于填充和空局部状态之间的电子跳跃或隧道：斜体> T < / ce：斜体> g 。弛豫时间由αβ - 斜射> - 通过将温度提高为无定形聚合物的典型行为来衰减。热力学参数的计算值通过增加掺杂浓度显示分子稳定性的增加;此功能支持PMMA / PVAC / C 60 纳米复合膜的应用在广泛的太阳能转换应用（如发光下降（LDS）涂层）中光伏电池。

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