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<strong>Dielectric relaxation properties of aqueous dimethylamine, trimethylamine and ethylamine using time domain reflectometry technique</strong>

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Title Statement <strong>Dielectric relaxation properties of aqueous dimethylamine, trimethylamine and ethylamine using time domain reflectometry technique</strong>
 
Added Entry - Uncontrolled Name Deshmukh, Mr. Avadhut Ramrao; School of physical sciences, Swami Ramanand Teerth Marathwada University, Nanded, India
Ingole, Ms. Shital Ashokrao; School of physical sciences, Swami Ramanand Teerth Marathwada University, Nanded, India
Shinde, Mr. Ravindra Vitthalrao; College of Agriculture Engineering and Technology, VNMKV, Parbhani.431402(M.S.)
Lokhande, Mr. Milid P.; Department of Physics, Govt. Vidarbha Institute of Science & Humanities, Amravati, India. 444604
Kumbharkhane, A C ; Electronics School of Physical Sciences SRTM University,Vishnupuri Nanded-431606, India
DST, New Delhi
 
Uncontrolled Index Term Time domain reflectometry; Complex permittivity; Dielectric relaxation; Thermodynamic parameter; Kirkwood factor
 
Summary, etc. The complex permittivity spectra of dimethylamine (40 wt. % in water), trimethylamine (30 wt. % in water) and ethylamine (70 wt. % in water) have been obtained at different temperature using time domain reflectometry technique in the frequency range of 10 MHz-50 GHz. The relaxation mechanism for these systems is described by using Cole-Davidson model. The temperature dependant dielectric relaxation parameters such as static dielectric constant (<em>ε<sub>0</sub></em>), relaxation time (<em>τ</em>) and distribution parameter (<em>β</em>) have been obtained by using non-linear least square fit method. The extracted static dielectric constant (<em>ε<sub>0</sub></em>) and relaxation time (<em>τ</em>) values have been used to calculate thermodynamic parameter and Kirkwood correlation factor (<em>g<sup>eff</sup></em>). The enthalpy of activation ∆<sub>act</sub><em>H</em> suggests that chemical kinetic is exothermic. Entropy of activation ∆<sub>act</sub>S suggests that the system is less ordered and Gibbs free energy of activation ∆<sub>act</sub><em>G</em> reveals the molecular reorientation for all the three systems. Kirkwood factor for DMA40, TMA30 and EA70 is greater than unity which confirms the hydrogen bond interaction and parallel orientation of dipoles in molecules.
 
Publication, Distribution, Etc. Indian Journal of Pure & Applied Physics (IJPAP)
2019-06-26 15:20:50
 
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http://op.niscair.res.in/index.php/IJPAP/article/view/23032
 
Data Source Entry Indian Journal of Pure & Applied Physics (IJPAP); ##issue.vol## 57, ##issue.no## 6 (2019): Indian Journal of Pure & Applied Physics
 
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Nonspecific Relationship Entry http://op.niscair.res.in/index.php/IJPAP/article/download/23032/465472204
 
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