Dielectric properties of ternary composites of triblock polymer surfactant, liquid crystal and organic solvent

Abstract

Dielectric spectroscopy, at room temperature (20°C), is used to study the dielectric response of ternary mixtures of commercial nematic liquid crystal mixtures E7 and E33, an organic solvent N-Methyl-2-Pyrrolidone (NMP) and a triblock polymers in the frequency range from 0.01 Hz to 1 MHz. The results indicate a dielectric relaxation in the hectohertz region. Individually, both E7 and NMP have rather large low frequency conductivities; however, the low frequency (0.01–10 Hz) behavior of the mixtures has no such behavior. We attribute this behavior to an ion getter effect of the triblock polymer surfactant. Optimized ternary mixtures obtain a real dielectric constant near 230, and loss tangent less than 0.05 at frequencies near 10 mHz.

Dielectric behaviour and dipole moment of binary mixtures containing certain amides in benzene

“…The static dipole moment of polar solute(v) dissolved in nonpolar solvent(u) at T Kelvin according to Debye model [10,14,15]…”

“…Interactions between the constituent molecules and response of binary mixtures to static low frequency electric field can be estimated from the magnitude of dielectric constant of mixture [3,[5][6][7][8]. Most of the knowledge pertaining to kinematics, the molecular interactions and industrial applications of liquid mixtures can be assessed through information about dielectric properties of binary liquid mixtures [9][10][11][12][13][14][15][16][17]. The Static dipole moment 𝜇 𝑠 in low frequency electric field helps to study molecular interactions between the solute and solvents in liquid mixtures [5,7].…”

“…The Static dipole moment 𝜇 𝑠 in low frequency electric field helps to study molecular interactions between the solute and solvents in liquid mixtures [5,7]. The dipole moment values of amides dissolved in nonpolar solvents provides vital information about intermolecular interactions, hydrogen bonding and dipolar orientation among molecules in binary mixtures [6,[14][15][16] . The knowledge of dipole moment 𝜇 𝑣 under high frequency electric field has been used to investigate dielectric response of binary mixture of amides dissolved in aromatic liquids [5,7,9,[15][16][17].…”