scholarly journals Acoustical Parameters of Polyvinyl Alcohol

2021 ◽  
Vol 16 (2) ◽  
Author(s):  
Richa Saxena ◽  
S C Bhatt ◽  
Manish Uniyal ◽  
S C Nautiyal
Keyword(s):  
Aqueous Solution ◽  
Molecular Weight ◽  
Relaxation Time ◽  
Polyvinyl Alcohol ◽  
Ultrasonic Velocity ◽  
Adiabatic Compressibility ◽  
Acoustical Parameters ◽  
Intermolecular Free Length ◽  
Different Temperatures ◽  
Ultrasonic Investigation

Ultrasonic investigation provides a wealth of information in understanding the intermolecular interaction of solute and solvent. An attempt has been made to measure density, viscosity and ultrasonic velocity of aqueous solution of polyvinyl alcohol of molecular weight approximately 140,000 at different temperatures 35οC, 40oC, 45οC, 50oC, 55οC, 60oC, 65οC at 0.8% concentration. Ultrasonic velocity is measured using ultrasonic interferometer at 1 MHz frequency. The acoustical parameters like, adiabatic compressibility, acoustic impedance, intermolecular free length and relaxation time have been calculated at different temperatures. These parameters were used to understand the behaviour of solute and solvent.

scholarly journals Study of Acoustic Nature of Tetrapentylammonium Bromide in N,N-Dimethyl-Ethylmethyl Ketone Systems at Different Temperatures

2015 ◽  
Vol 48 ◽  
pp. 103-113
Author(s):  
Baljeet Singh Patial
Keyword(s):  
Relaxation Time ◽  
Internal Pressure ◽  
Ultrasonic Velocity ◽  
Acoustic Impedance ◽  
Adiabatic Compressibility ◽  
Solvent Mixtures ◽  
Density Data ◽  
Solvent Interactions ◽  
Intermolecular Free Length ◽  
Different Temperatures

Ultrasonic velocity, viscosity and density studies on solution of tetrapentylammonium bromide (Pen4NBr) in N,N-dimethylformamide, ethylmethylketone (EMK) and DMF-EMK solvent mixtures containing 0, 20, 40, 60, 80 and 100 mol % of DMF at 298, 308 and 318K have been reported. From the velocity, viscosity and density data values, various parameters namely, the adiabatic compressibility (β), Intermolecular free length (Lf), specific acoustic impedance (Z), free volume (Vf), internal pressure (πi) and relaxation time (τ) have been calculated. All these parameters have been discussed separately to throw light on the solute-solvent and solvent-solvent interactions.

scholarly journals Molecular Association Studies on Polyvinyl Alcohol at Different Concentrations

2018 ◽  
Vol 2018 ◽  
pp. 1-5
Author(s):  
Richa Saxena ◽  
S. C. Bhatt
Keyword(s):  
Relaxation Time ◽  
Polyvinyl Alcohol ◽  
Acoustic Impedance ◽  
Association Studies ◽  
Adiabatic Compressibility ◽  
Ultrasonic Velocities ◽  
Acoustical Parameters ◽  
Solvent Interaction ◽  
Intermolecular Free Length ◽  
Solute Solvent Interaction

Ultrasonic velocities, densities, and viscosities have been measured for the solution of polyvinyl alcohol in water at concentration range of 0.3% to 1% at temperature 35°C. Ultrasonic velocities have been measured using variable path ultrasonic interferometer at 1 MHz frequency. The acoustical parameters like adiabatic compressibility, acoustic impedance, intermolecular free length, and relaxation time have been calculated by using above-mentioned values of ultrasonic velocities, densities, and viscosities. The variation of these acoustical parameters is explained in terms of solute-solvent interaction in a polymer solution.

scholarly journals Density, Viscosity and Ultrasonic Velocity of Polyethylene Glycol

2021 ◽  
Vol 16 (2) ◽  
Author(s):  
Richa Saxena ◽  
SC Bhatt ◽  
Manish Uniyal ◽  
S C Nautiyal
Keyword(s):  
Relaxation Time ◽  
Polyethylene Glycol ◽  
Polymer Solution ◽  
Ultrasonic Velocity ◽  
Acoustic Impedance ◽  
Adiabatic Compressibility ◽  
Acoustical Parameters ◽  
Free Length ◽  
Intermolecular Free Length ◽  
Ultrasonic Interferometer

Ultrasonic velocity, density, and viscosity of polyethylene glycol have been measured for the solution in water at concentration range of 0.3% to 1% at temperature 50oC. Ultrasonic velocity has been measured using ultrasonic interferometer at 1MHz frequency. By using the values of ultrasonic velocity, density, and viscosity, various acoustical parameters like adiabatic compressibility, acoustic impedance, intermolecular free length, and relaxation time have been calculated. The change in these acoustical parameters is explained in terms of solutesolvent interaction in a polymer solution.

scholarly journals Acustical Studies of Interactions in the Binary Mixtures of Ethylmethyl Ketone (EMK) and N,N-Dimethylformamide (DMF) through Ultrasonic Measurements at Different Temperatures

2015 ◽  
Vol 47 ◽  
pp. 120-132
Author(s):  
Baljeet Singh Patial
Keyword(s):  
Relaxation Time ◽  
Internal Pressure ◽  
Acoustic Impedance ◽  
Adiabatic Compressibility ◽  
Ultrasonic Velocities ◽  
Intermolecular Free Length ◽  
Acoustical Parameter ◽  
Wada’S Constant ◽  
Ultrasonic Measurements ◽  
Different Temperatures

Ultrasonic velocities (u), densities (ρ) and viscosities (η) are measured in respect of ethylmethylketone (EMK) and N,N-dimethylformamide (DMF) over the entire composition at 298, 308and 318K. Attempt have been made to extract the information with respect to various kind of intermolecular interactions, such as H-bonding, dipole-dipole, solute –solvent, dispersion type interactions existing between these two components from the following acoustical parameter when examined as a function of solvent composition at different temperatures: adiabatic compressibility (β), specific acoustic impedance (Z), intermolecular free length (Lf), molar sound velocity (Rm), wada’s constant (W), viscous relaxation time (τ), free volume and internal pressure (πi).

Ultrasonic Study of Substituted Thiazoles at Different Temperatures

2015 ◽  
Vol 61 ◽  
pp. 105-109 ◽  
Author(s):  
A.B. Naik
Keyword(s):  
Ultrasonic Velocity ◽  
Adiabatic Compressibility ◽  
Effect Of Temperature ◽  
Water Mixture ◽  
Excellent Correlation ◽  
Acoustical Parameters ◽  
Temperature Variations ◽  
Solvent Interaction ◽  
Pure Solvent ◽  
Different Temperatures

Density, ultrasonic velocity of pure solvent, dimethylformamide (DMF) and ligand solutions of substituted thiazoles in DMF-water mixture were measured at different temperatures (303.15, 308.15, 313.15 and 318.15) K. Acoustical parameters such as adiabatic compressibility, intermolecular free length, acoustical impedance and relative association were determined from experimental data of density and ultrasonic velocity. The effect of temperature variations on the strength of molecular interaction has also been studied. An excellent correlation represents in terms of solute-solvent and solvent-solvent interaction at all temperatures.

Acoustical Studies and Molecular Interaction of Salicilaldehyde with Iodine in Hexane at Different Temperatures

2015 ◽  
Vol 1086 ◽  
pp. 111-119
Author(s):  
Selvi C. Senthamil ◽  
S. Ravichandran ◽  
C.P. Malliga ◽  
C. Thenmozhi ◽  
V. Kannappan
Keyword(s):  
Free Volume ◽  
Ultrasonic Velocity ◽  
Adiabatic Compressibility ◽  
Single Frequency ◽  
Acoustical Parameters ◽  
Compact Structure ◽  
Solvent Interactions ◽  
Different Temperatures ◽  
Type Interaction ◽  
Coefficient Of Viscosity

Ultrasonic velocity and density of salicilaldehyde with iodine in hexane has been measured at 293.15K, 298.15K, 303.15K and 308.15K in different concentration. Ultrasonic velocity has been measured using single frequency interferometer at 2MHz (Model F-81). By using the Ultrasonic velocity (u), density (ρ) and coefficient of viscosity (η) and the other acoustical parameters adiabatic compressibility (κ), free length (Lf), interaction parameter (α), Free volume (Vf) were calculated. The addition of hexane with a mixture leads to a compact structure due to presence of dipolar type interaction. This contributes to the decrease in free volume values and the internal pressure shows an increasing trend. The results have been discussed in terms of solute-solute and solute-solvent interactions between the component and the compatibility of these methods in predicting the interactions in these mixtures has also been discussed.Key Words salicilaldehyde, iodine, hexane, Ultrasonic velocity, molecular interactions.

scholarly journals Acoustical Investigation of N–(2-hydroxybenzylidene)-3-Substituted Pyridine -2- Amine Schiff bases by Ultrasonic Velocity Measurements in Dioxane at Different Temperatures

2016 ◽  
Vol 4 (1) ◽  
Author(s):  
Mrunal M. Mahajan ◽  
Pravin B. Raghuwanshi
Keyword(s):  
Schiff Bases ◽  
Ultrasonic Velocity ◽  
Adiabatic Compressibility ◽  
Water Molecules ◽  
Water Medium ◽  
Velocity Measurements ◽  
Acoustic Parameters ◽  
Intermolecular Free Length ◽  
Different Temperatures ◽  
Solvent Molecules

<div><p><em>The present work deals with the study of acoustic parameters like ultrasonic velocity (V), </em><em>adiabatic compressibility (β<sub>s</sub>), apparent molar volume (</em><em>f</em><em><sub>v</sub></em><em>) and intermolecular free length (L<sub>f</sub>) by ultrasonic </em><em>interferometric measurements</em><em> which reflects structural interaction of water molecules and organic solvent molecules with substituted Schiff bases. The study of N–(2-hydroxybenzylidene)-3-substituted pyridine -2- amine Schiff bases were carried in different percentage of 1,4-dioxane-water medium, at 293, 297 and 300 K. The densities and velocities thus obtained were used to evaluate acoustic parameters for all the ligands.</em></p></div>

scholarly journals Ultrasonic Studies on the Nature of Molecular Interaction of Synthesized Mannich Bases in DMSO at Different Temperatures

2019 ◽  
Vol 31 (4) ◽  
pp. 960-964
Author(s):  
S. Farook Basha ◽  
M. Syed Ali Padusha
Keyword(s):  
Free Energy ◽  
Relaxation Time ◽  
Absorption Coefficient ◽  
Adiabatic Compressibility ◽  
Mannich Bases ◽  
Jones Potential ◽  
Intermolecular Free Length ◽  
Different Temperatures ◽  
Methyl Hydrazine ◽  
Available Volume

This work deals with the ultrasonic studies of the Mannich bases (morpholin-4-yl)(pyridin-3- yl)methyl]hydrazine carboxamide (MPH) and (morpholino)(thiophen-2-yl)methyl)nicotine hydrazide (MTN) by the measurements of parameters such as ultrasonic velocity (U), density (ρ), viscosity (η), adiabatic compressibility (κ), intermolecular free length (Lf), molar volume (Vm), relaxation time (τ), specific acoustic impedance (Z), lenard jones potential (LJP), internal pressure (πi), free volume (Vf) and molecular cohesive energy (MCE), available volume (Va), Gibbs free energy (ΔG) and absorption coefficient (α/f2). These results are inferred that the strong interaction exists between the solvent (DMSO) and solute (MPH and MTN).

scholarly journals Ultrasonic Investigation of Molecular Interactions in Binary Mixtures at 303 K

2009 ◽  
Vol 6 (1) ◽  
pp. 138-140 ◽  
Author(s):  
R. Nithya ◽  
S. Nithiyanantham ◽  
S. Mullainathan ◽  
M. Rajasekaran
Keyword(s):  
Free Volume ◽  
Binary Mixtures ◽  
Ultrasonic Velocity ◽  
Molecular Interactions ◽  
Molecular Interaction ◽  
Binary Systems ◽  
Adiabatic Compressibility ◽  
Acoustical Parameters ◽  
Free Length ◽  
Ultrasonic Investigation

The ultrasonic velocity, density and viscosity at 303 K have been measured in the binary systems of toluene with benzene ando-xylone with benzene. The acoustical parameters such as adiabatic compressibility, free length, free volume and acoustical impedance are calculated. The results are interpreted in terms of molecular interaction between the components of the mixtures

scholarly journals Excess Transport Properties of Binary Mixtures of Quinoline with Xylenes at Different Temperatures

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Sk. Fakruddin ◽  
Ch. Srinivasu ◽  
B. R. Venkateswara Rao ◽  
K. Narendra
Keyword(s):  
Ultrasonic Velocity ◽  
Acoustic Impedance ◽  
Adiabatic Compressibility ◽  
Polynomial Equation ◽  
Liquid Mixtures ◽  
Excess Functions ◽  
Free Length ◽  
Intermolecular Free Length ◽  
Excess Parameters ◽  
Different Temperatures

The ultrasonic velocity and density of binary liquid mixtures of quinoline with o-xylene, m-xylene, and p-xylene have been measured over the entire range of composition at = 303.15, 308.15, 313.15, and 318.15 K. Using these data, various parameters like adiabatic compressibility (β), intermolecular free length (), and acoustic impedance () and some excess parameters like excess adiabatic compressibility (), excess intermolecular free length (), excess acoustic impedance (), and excess ultrasonic velocity () have been calculated for all the three mixtures. The calculated deviations and excess functions have been fitted to Redlich-Kister polynomial equation. The observed deviations have been explained on the basis of the intermolecular interactions present in these mixtures.

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