Static permittivities, viscosities, refractive indices and electrical conductivities of the binary mixtures of acetonitrile with poly(ethylene glycol)-200 at temperatures 288.15–318.15 K
Static permittivities, viscosities, refractive indices and electrical conductivities of the binary mixtures of acetonitrile with poly(ethylene glycol)-200 at temperatures 288.15–318.15 K
复制标题
乙腈与聚乙二醇-200的二元混合物在288.15–318.15K温度下的静态介电常数、粘度、折射率和电导率
DOI：
10.1016/j.molliq.2018.08.137
复制
发表时间：
2018
影响因子：
6
通讯作者：
S. Choudhary
中科院分区：
文献类型：
--
作者：
R. J. Sengwa;Priyanka Dhatarwal;S. Choudhary
本文报道了乙腈（ACN）与聚乙二醇二元混合物（PEG; Mw= 200 g mol−1）在288.15 K至318.15 K的整个组成范围内的相对静态介电常数、粘度、折射率和电导率。从基于体积分数的添加剂关系中确定的过剩性能证实，ACN和PEG分子之间的氢键相互作用对其混合物中的介电常数有轻微的正作用，然而，这些相互作用大大降低了混合物的粘度。ACN - peg混合物的黏度活化能和电导率活化能随ACN浓度的增加而减小。用不同温度下的交流电导率和粘度积，再加上静态介电常数，分析了这两种二元混合物在介电粘性介质中的电荷传导行为。在298.15 K下，在20 Hz到1 MHz的频率范围内，对这些混合物的复介电常数、交流电导率和阻抗谱也进行了研究。探讨了电极极化过程对这些混合物的介电常数和电谱的影响范围。在ACN-PEG混合物中，电极极化弛豫时间与直流电导率之间存在相关性。
Relative static permittivities, viscosities, refractive indices and electrical conductivities of the binary mixtures of acetonitrile (ACN) with poly(ethylene glycol) (PEG; Mw= 200 g mol−1) over the whole composition range and temperatures from 288.15 K to 318.15 K have been reported. The excess properties determined from the volume fraction based additive relation confirm that the hydrogen-bond interactions between the ACN and PEG molecules in their mixtures contribute to permittivities slight positively, whereas, these interactions greatly reduce the viscosities of the mixtures. The viscosity activation energy and conductivity activation energy values for the ACN–PEG mixtures are found decreasing with the increase of ACN concentration in the mixtures. The charge conduction behaviour in the dielectric viscous media of these binary mixtures has been analyzed by using the values of ac electrical conductivity and viscosity product which further included with static permittivity at different temperatures. The complex permittivity, ac electrical conductivity, and impedance spectra over the frequency range from 20 Hz to 1 MHz at 298.15 K have also been investigated for these mixtures. The static permittivity frequency range over which the dielectric and electrical spectra of these mixtures are affected by the electrode polarization process has been explored. A correlation between electrode polarization relaxation time and dc electrical conductivity has been observed for the ACN–PEG mixtures.