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IJPAP Vol.42(11) [November 2004] >


Title: Microwave dielectric relaxation study of binary mixtures of cyclohexylamine with acetophenone and p-chloroacetophenone in dilute solutions of benzene
Authors: Gupta, K K
Bansal, A K
Singh, P J
Sharma, K S
Keywords: Microwave dielectric relaxation
Binary mixtures
Issue Date: Nov-2004
Publisher: CSIR
IPC CodeG 01 R 27/26
Abstract: Static permittivity at 100 kHz, complex permittivity at 8.93 GHz and high frequency permittivity at frequency of the D-lines of sodium of cyclohexylamine (CHA), acetophenone (ACT), p-chloroacetophenone (PCLA) and for the binary mixtures of CHA+ACT and CHA+PCLA have been measured in dilute solutions of benzene at different temperatures. The measured values of permittivity and dielectric loss have been used to evaluate relaxation times [0, (1) and (2)], dipole moment (), distribution parameter () and thermodynamical parameters like molar free energy of activation (FÎ), molar enthalpy of activation (HÎ) and molar entropy of activation (SÎ). The relaxation times of binary mixture compositions are consistent with the computed values obtained from various theoretical methods. Present study suggests the existence of both the intramolecular and overall orientation in both the binary mixtures. Formation of complexes is noticed in 1:1 binary mixture of CHA+PCLA.
Page(s): 849-853
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.42(11) [November 2004]

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