ELECTRICAL CONDUCTIVITY AND DIELECTRIC RELAXATION STUDY OF POLYVINYL ACETATE/POLY METHYL METHACRYLATE BLENDS
ELECTRICAL CONDUCTIVITY AND DIELECTRIC RELAXATION STUDY OF POLYVINYL ACETATE/POLY METHYL METHACRYLATE BLENDS
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DOI：
10.1142/s0217979212501597
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发表时间：
2012-11-20
影响因子：
1.7
通讯作者：
Ahmed, R. M.
中科院分区：
文献类型：
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作者：
Ahmed, R. M.
采用溶液流延技术制备了 PMMA（聚甲基丙烯酸甲酯）、PVAc（聚醋酸乙烯酯）及其共混物的透明薄膜。报告了介电性能和电导率。研究了频率范围为 1 kHz 至 5 MHz 和温度范围为 303-413 K 的样品的介电常数 epsilon' 和 tan δ 与频率和温度的关系。此外，根据介电数据计算了交流电导率值，并讨论了传导机制。不同温度下频率相关的电导率行为提供了传导机制的定性描述。此外，还对所研究的样品进行了差示扫描量热法 (DSC) 扫描。
Transparent films of PMMA (poly methyl methacrylate), PVAc (polyvinyl acetate) and their blends, have been prepared by using a solution-casting technique. The dielectric properties and the electrical conductivity are reported. The frequency and temperature dependence of the dielectric constant, epsilon' and tan delta, have been investigated for the studied samples in the frequency range from 1 kHz to 5 MHz and over a range of temperature from 303-413 K. In addition, AC conductivity values were calculated from the dielectric data and the conduction mechanism is discussed. The frequency-dependent conductivity behavior at different temperatures provides a qualitative description of the conduction mechanism. Also, differential scanning calorimetry (DSC) scans have been measured for the studied samples.