Acoustic parameter investigation of polyvinyl acetate with acetic acid using ultrasonic technique

2013 ◽  
Vol 33 (9) ◽  
pp. 851-856 ◽  
Author(s):  
Baljinder Kaur ◽  
Kailash C. Juglan
Keyword(s):  
Acetic Acid ◽  
Ultrasonic Velocity ◽  
Polyvinyl Acetate ◽  
Ultrasonic Attenuation ◽  
Adiabatic Compressibility ◽  
Acoustic Parameter ◽  
Solvent Interaction ◽  
Wada’S Constant ◽  
Rao’S Constant ◽  
Solvent Molecules

Abstract Density, viscosity and ultrasonic velocity of polyvinyl acetate with acetic acid have been measured at a temperature of 299K for different concentrations. Density and viscosity have been measured for a binary liquid mixture with a specific gravity bottle and a viscometer. Ultrasonic velocity has been measured using a single crystal interferometer at a frequency of 2 MHz. Ultrasonic velocities for the binary mixture at 1 MHz and 2 MHz was compared by taking some values from the literature. The sound velocity (V), density (ρ) and viscosity (η) were used to calculate the parameters such as adiabatic compressibility (β), acoustic impedance (Z), intermolecular free length (Lf), ultrasonic attenuation (α/f2) and relaxation time (τ). The variations of experimentally obtained parameters indicate the presence of molecular interaction between the molecules of the mixture. The ultrasonic velocity increased with an increase in concentration. Solute-solvent interaction is further confirmed by viscosity values, which increased with increasing concentration suggesting more association between solute and solvent molecules. The linear variations in Rao’s constant and Wada’s constant suggest the absence of complex formation.

scholarly journals Acoustic, thermal and optical properties of organic based disodium tartrate salt

2021 ◽  
Vol 2 (1) ◽  
pp. 012-027
Author(s):  
M. Sathish ◽  
K. Venkataramanan ◽  
R. Padmanaban ◽  
Helan Ruth ◽  
K. Vadivel ◽  
...  
Keyword(s):  
Optical Properties ◽  
Aqueous Solutions ◽  
Internal Pressure ◽  
Ultrasonic Velocity ◽  
Relative Viscosity ◽  
Adiabatic Compressibility ◽  
Lower Percentage ◽  
Wada’S Constant ◽  
Different Temperatures ◽  
Solvent Molecules

In this work, acoustic, thermal, and optical properties were tested on the different concentrations of the Disodium Tartrate solutions. First, the viscosity studies were analyzed for the Disodium tartrate in the concentration range from 2% to 20% with different temperatures 303K, 308K, 313K, and 318K. It was noted that the relative viscosity and the activation energy of the prepared compound increase with increases in concentration and decreases with temperature increases. The properties like density and ultrasonic velocity are varied when increases the concentration of the aqueous solutions of Disodium Tartrate. In this study, the values of adiabatic compressibility show an inverse behavior when compared with ultrasonic velocity due to the interaction between solute and solvent molecules. Also observed that the inter-molecular free length is maximum for a lower percentage. The free volume for the compound is maximum at 2% and a minimum of 20%, since it reduces when the internal pressure increases. It was revealed that the classical absorption coefficient and relaxation time for Disodium Tartrate is minimum for lower percentage and minimum for a higher percentage. The interactions between the solute and solvent are confirmed through the property like specific Acoustical impedance. It was noted that the increase in internal pressure increases the concentration of the compound. The ion-solvent interaction was discussed by the relative association study, thus the values of relative association increases with an increase in concentration. The Rao’s and Wada’s constant increases linearly in aqueous solutions of Disodium Tartrate for the entire system.

STUDY OF THERMODYNAMICAL PROPERTIES OF POLYVINYL ACETATE IN TETRAHYDROFURAN

2012 ◽  
Vol 26 (27) ◽  
pp. 1250180 ◽  
Author(s):  
PRIYANKA V. TABHANE ◽  
OMPRAKASH P. CHIMANKAR ◽  
VILAS A. TABHANE
Keyword(s):  
Ultrasonic Velocity ◽  
Polyvinyl Acetate ◽  
Adiabatic Compressibility ◽  
Ultrasonic Waves ◽  
Acoustical Parameters ◽  
Solvent Interaction ◽  
Pulse Echo ◽  
The Given ◽  
Insight Into ◽  
Made In

The propagation of ultrasonic waves and the measurement of their velocity in solutions form an important tool for the evaluation of various acoustical and thermodynamical parameters which give an insight into the nature of miscibility and molecular interactions in polymer solutions. In the present study, the ultrasonic velocity, density, viscosity measurements have been made in 0.1 M solution using pulse echo overlap technique at 293 K at the different concentrations of polyvinyl acetate in tetrahydrofuran. Thermo-acoustical parameters viz., adiabatic compressibility, molar sound velocity, molar compressibility, expansion coefficient, acoustic impedance, van der Waals' constant and internal pressure have been computed from the experimental data. The nature of polymer/solvent interaction and the effect of concentration on the molecular interaction are studied. The nonlinear variations of polyvinyl acetate in tetrahydrofuran have been studied. The variation of ultrasonic velocity and other thermo-acoustical parameters shows nonlinear increase or decrease with molar concentration which suggest semi-compatibility of the polymer in the given solvent.

scholarly journals Ultrasonic study of molecular interactions in binary mixtures of methyl methacrylate(MMA) with toluene and dimethylacetamide at 318 K

2016 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
R.G. Indhumathi
Keyword(s):  
Methyl Methacrylate ◽  
Binary Systems ◽  
Adiabatic Compressibility ◽  
Acoustical Parameters ◽  
Binary Solutions ◽  
Intermolecular Free Length ◽  
Wada’S Constant ◽  
Ultrasonic Measurements ◽  
Rao’S Constant ◽  
First Time

<p>The ultrasonic velocity, density and viscosity at 318K have been measured in the binary systems of Methyl methacrylate + Toluene and Methyl methacrylate + Dimethylacetamide. In this work an attempt has been made for the first time to investigate the behavior of binary solutions of Methylmethacrylate(MMA) in Toluene and Dimethylacetamide(DMAC) with regard to acoustical parameters such as adiabatic compressibility(β), intermolecular free length(l<sub>f</sub>), free volume(V<sub>f</sub>), Rao’s constant(R), Wada’s constant(W) and specific acoustical impedance(Z) from ultrasonic measurements at 318 K were calculated. The results are interpreted in terms of molecular interaction between the components of mixtures.</p>

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

2010 ◽  
Vol 7 (2) ◽  
pp. 353-356 ◽  
Author(s):  
S. Mullainathan ◽  
S. Nithiyanantham
Keyword(s):  
Experimental Data ◽  
Internal Pressure ◽  
Molecular Interactions ◽  
Molecular Interaction ◽  
Binary Systems ◽  
Adiabatic Compressibility ◽  
Acoustical Parameters ◽  
Intermolecular Free Length ◽  
Wada’S Constant ◽  
Rao’S Constant

The ultrasonic velocity, density and viscosity at 303 K have been measured in the binary systems of 1,4-dioxane and acetone with water. From the experimental data, various acoustical parameters such as adiabatic compressibility (β), intermolecular free length (Lf), free volume (Vf), internal pressure (πi), Rao’s constant (R), Wada’s constant (W) and specific acoustical impedance (Z) were calculated. The results are interpreted in terms of molecular interaction between the components of the mixtures.

scholarly journals Low Energy Gamma Radiation Induced Effects on Ultrasonic Velocity and Acoustic Parameters in Polyvinylidene Fluoride Solution

2016 ◽  
Vol 2016 ◽  
pp. 1-8
Author(s):  
S. S. Kulkarni ◽  
U. V. Khadke
Keyword(s):  
Polymer Solution ◽  
Dose Rate ◽  
Ultrasonic Velocity ◽  
Polyvinylidene Fluoride ◽  
Ultrasonic Attenuation ◽  
Ferroelectric Properties ◽  
Adiabatic Compressibility ◽  
Free Path Length ◽  
Low Energy ◽  
Acoustic Parameters

The modification of polyvinylidene fluoride (PVDF) polymer properties with irradiation is of interest as it possesses unique piezo-, pyro-, and ferroelectric properties. In this paper, we report the results of acoustic parameters of irradiated PVDF mixed with dimethylacetamide (DMAC) solution with low energy γ-source (Cs-137). The polymer solution covered with mica film assures only γ-ray passage and the duration was increased from 18 to 50 hours to achieve the higher dose rate. The dose rate was estimated using the strength of the radioactive source and the duration of the exposure. The ultrasonic velocity (v), density (ρ), and viscosity (η) of 0.2 wt% and 0.5 wt% PVDF dissolved in pure DMAC solution, irradiated with different dose rate were measured using ultrasonic interferometer (Mittal make), Pyknometer, and Oswald’s viscometer, respectively. It is observed that the values of v, ρ, and η change with dose rate. The acoustic parameters such as adiabatic compressibility (β), intermolecular free path length (Lf), acoustic impedance (Z), relative association (RA), ultrasonic attenuation (α/f2), and relaxation time (τ) are calculated using the experimental data. These results are interpreted in terms of the solute-solvent interaction in a polymer solution and scissoring chain damage.

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.

scholarly journals Acoustical Studies of Binary Liquid Mixtures of p-Chlorotoluene in Benzene at Different Temperatures

2014 ◽  
Vol 29 ◽  
pp. 25-37 ◽  
Author(s):  
G. Pavan Kumar ◽  
Ch. Praveen Babu ◽  
K. Samatha ◽  
A.N. Jyosthna ◽  
K. Showrilu
Keyword(s):  
Molecular Interactions ◽  
Molecular Interaction ◽  
Adiabatic Compressibility ◽  
Liquid Mixtures ◽  
Ultrasonic Velocities ◽  
Acoustical Parameters ◽  
Binary Liquid ◽  
Wada’S Constant ◽  
Rao’S Constant ◽  
Different Temperatures

Ultrasonic velocities (U), densities (ρ), and coefficient of viscosities (η) are measured for binary mixtures containing (i) p-chlorotoluene and (ii) benzene at 303.15 K, 308.15 K, 313.15 K and 318.15 K to understand the molecular interaction. Various acoustical parameters such as adiabatic compressibility (βad), free length (Lf), acoustic impedance (Z), free volume (Vf), molar volume (Vm), Rao’s constant (R), Wada’s constant (W) and internal pressure (πi), are calculated from the measured values of U, ρ, and η. The trend in acoustical parameters also substantiates to asses strong 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>

Molecular interactions in solutions of poly vinyl alcohol : an ultrasonic study

2016 ◽  
Vol 4 (2) ◽  
pp. 15 ◽  
Author(s):  
M Vigneswari ◽  
S. S Saravanakumar ◽  
V. N Suresh ◽  
S Sankarrajan
Keyword(s):  
Ultrasonic Velocity ◽  
Molecular Interactions ◽  
Molecular Interaction ◽  
Vinyl Alcohol ◽  
Ultrasonic Attenuation ◽  
Adiabatic Compressibility ◽  
Ternary Mixtures ◽  
Hydroxyl Group ◽  
Poly Vinyl Alcohol ◽  
Acoustical Parameters

Ultrasonic velocity, density, viscosity have been measured experimentally in the binary and ternary mixtures of Poly Vinyl Alcohol (PVA), water and borax with various concentration at 301.32 K. As the acoustical parameters like adiabatic compressibility, intermolecular free length, relaxation time, acoustic impedance, surface tension, Rao’s and Wada’s constant, ultrasonic attenuation and free volume would be more useful to predict and confirm the molecular interaction, these have been determined by using ultrasonic velocity, density and viscosity of the prepared solution. It has been identified that the molecular interactions in binary mixture were stronger than that of in ternary mixtures. And also there is a strong solute – solvent interaction occurring in both binary and ternary solutions. This may be due to the greater possibility of hydrogen bonding between PVA and Water molecules. When the borax is added, the molecular interaction is getting weaker due to greater affinity of borate ion towards the hydrogen in hydroxyl group of PVA.

scholarly journals Effect of Solvents on the Ultrasonic Velocity and Acoustic Parameters of Polyvinylidene Fluoride Solutions

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
S. S. Kulkarni ◽  
U. V. Khadke
Keyword(s):  
Ultrasonic Velocity ◽  
Polyvinylidene Fluoride ◽  
Ultrasonic Attenuation ◽  
Adiabatic Compressibility ◽  
Free Path Length ◽  
Solvent Mixtures ◽  
Acoustic Parameters ◽  
Effect Of Solvents ◽  
Molecular Behavior ◽  
Ostwald Viscometer

Ultrasonic studies provide a wealth of information in understanding the molecular behavior and intermolecular interaction of polymer solvent mixtures. Attempts were made to measure ultrasonic velocity, density, and viscosity for the mixture of polyvinylidene fluoride (PVDF) in acetone and dimethylformamide (DMF) of various stoichiometric ratios at 300 K using crystal controlled ultrasonic interferometer (Mittal make), pyknometer (specific gravity bottle), and Ostwald viscometer, respectively. The acoustic parameters adiabatic compressibility (β), intermolecular free path length (Lf), acoustic impedance (Z), relative association (RA), ultrasonic attenuation (α/f2), and relaxation time (τ) have been estimated using experimental data with well-known techniques. The variation of these acoustic parameters is explained in terms of solute-solvent molecular interaction in a polymer solution.

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