Abstract
The permittivity for N-Methyl-Pyrrolidone (NMP)–water mixtures has been determined from frequency 20MHz to 26GHz at 298K using dielectric relaxation spectroscopy (DRS). The dielectric behavior is described well by Davidson–Cole model. The excess inverse relaxation time and excess inverse permittivity describe a hydrogen bond effect for molecular relaxation time and interactions. The Luzar model provides an explanation of experimental results related to the static permittivity and estimates numbers of hydrogen bond in the mixture. We parameterize NMP–water cluster interactions providing insights into the underlying mechanism of relaxations.
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