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<strong>Dielectric relaxation studies of acetonitrile/propylene glycol and their binary mixtures</strong>

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Title Statement <strong>Dielectric relaxation studies of acetonitrile/propylene glycol and their binary mixtures</strong>
 
Added Entry - Uncontrolled Name Sastry, S. Sreehari; Acharya Nagarjuna University
Sarma, N. K.S.P.S.; Acharya Nagarjuna University
Vishwam, T ; Gitam University Hyderabad Campus
Murthy, V.R.K. ; Indian Institute of Technology Madras
UGC AND DST
 
Uncontrolled Index Term condensed matter physics dielectric studies
Complex permittivity; dielectric relaxation; excess permittivity; Kirkwood correlation factor; Helmholtz energy
 
Summary, etc. Dielectric relaxation spectra in the frequency range 0.02 &lt; ν/GHz &lt; 20 have been collected for propylene glycol (PG), acetonitrile (AN) and their binary mixtures between 303 K-323 K. The average relaxation times have been calculated by the Cole-Davidson and Cole-Cole relaxation models. The experimental determined values of static dielectric permittivity (ε<sub>0</sub>), relaxation time (τ), excess permittivity (ε<sup>E</sup>) and excess inverse relaxation time (1/τ)<sup>E </sup> show smooth temperature dependence. The larger relaxation time values of propylene glycol when compared to acetonitrile are due to the co-operative process of multimers with O-H-O linkage and also the steric hindrance behavior phenomena. The activation entropy (Δ<em>S*</em>), activation enthalpy (Δ<em>H*</em>), Kirkwood correlation factor (<em>g<sub>f</sub></em>), Helmholtz energy (Δ<em>F</em><sup>E</sup>) parameters have also been determined for propylene glycol and acetonitrile and the results have been correlated.
 
Publication, Distribution, Etc. Indian Journal of Pure & Applied Physics (IJPAP)
2017-06-20 13:27:52
 
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http://op.niscair.res.in/index.php/IJPAP/article/view/15357
 
Data Source Entry Indian Journal of Pure & Applied Physics (IJPAP); ##issue.vol## 55, ##issue.no## 6 (2017): Indian Journal of Pure & Applied Physics
 
Language Note en
 
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