Ultrasonic Study of Molecular Interactions in Polymeric Solution of Polypropylene Glycol-400 and Ethanol at 303 K

2019 ◽  
Vol 105 (5) ◽  
pp. 743-752
Author(s):  
Monika Dhiman ◽  
Kuljeet Singh ◽  
Jyotsna Kaushal ◽  
Arun Upmanyu ◽  
D. P. Singh
Keyword(s):  
Bulk Modulus ◽  
Free Volume ◽  
Molecular Interactions ◽  
Cohesive Energy ◽  
Adiabatic Compressibility ◽  
Polymer Mixture ◽  
Polypropylene Glycol ◽  
Polymeric Solution ◽  
Free Length ◽  
Dynamical Parameters

A comprehensive ultrasonic investigation of molecular interactions in the polymeric solution of polypropylene glycol (PPG)-400 and ethanol at 303 K has been performed using the data available in literature. Several acoustic parameters such as acoustic impedance, isothermal compressibility, molar sound velocity, molar adiabatic compressibility, internal pressure, free volume, van der Waals constants, molar cohesive energy and relaxation time have been explored. Thermo-dynamical parameters viz.: available volume, intermolecular free length, relative association, surface tension, pseudo-Gruneisen parameter, Debye temperature, diff usion constant, coefficient of thermal conductivity and latent heat of melting have been evaluated. Several thermo- elastic parameters such as Young modulus, shear modulus, bulk modulus and Poisson's ratio are also determined. Excess parameters are computed to study the relative molecular interactions and strength of interaction between the constituents of the polymer mixture. The volume expansivity data is used to evaluate Moelwyn-Hughes parameter, reduced volume, reduced isothermal bulk modulus, Sharma's constants, Huggins parameter, isobaric, isochoric, and isothermal lattice Gruneisen parameters, fractional free volume, repulsive exponent, Bayer's non-linear parameter, cohesive energy density and characteristic temperature. Schaaff 's collision factor theory, Jacobson's free length theory, Nomoto's relation, Van Dael-Vangeel relation, impedance dependence relation, Junjie relation and ideal mixing relation have been used to evaluate ultrasonic velocities in the system under study. The obtained results have been compared with earlier experimental results. The non-ideal behaviour of the mixture has been explained in terms of its composition and variation of its acoustical and thermo-dynamical parameters.

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 Acoustical Properties and Molecular Interactions in Ternary Liquid Mixtures of 3(Meta)Methoxy Phenol, 1 Propanol and n- Hexane at 303 K, 308 K & 313 K using Ultrasonic Techniques

2019 ◽  
Vol 8 (10S) ◽  
pp. 99-105 ◽  
Keyword(s):  
Internal Pressure ◽  
Free Volume ◽  
Ultrasonic Velocity ◽  
Molecular Interactions ◽  
Adiabatic Compressibility ◽  
Liquid Mixtures ◽  
Ternary Mixtures ◽  
Excess Properties ◽  
Acoustical Parameters ◽  
Free Length

The Ultrasonic velocity(U), density(ρ), and viscosity(η) have been measured experimentally for the ternary liquid mixtures of 3(meta) methoxy phenol(MMP), 1 propanol and n hexane at various temperatures viz., 303 K, 308 K and 313 K at constant frequency of 2 MHz. for different concentrations ranges from 0.001M to 0.01M. The thermodynamic and acoustical parameters such as adiabatic compressibility(β), Rao constant(R), absorption coefficient (α/f2 ), internal pressure(πi), cohesive energy(CE), free volume(Vf), free length(Lf), acoustic impedence(z), available volume(Va), viscous relaxation time and Lenard Jones potential were calculated from the experimental data. The various excess properties including excess Ultrasonic velocity, excess acoustic impedence, excess free length, excess adiabatic compressibility, excess free volume and excess internal pressure were also computed. The variation of these excess parameters with respect to concentration and temperatures have been discussed in the light of molecular interaction. The molecular interactions were predicted based on the results obtained for ultrasonic velocities of different concentrations of the ternary mixtures at different temperatures.

scholarly journals Thermodynamic and Acoustic Study on Molecular Interactions in Certain Binary Liquid Systems Involving Ethyl Benzoate

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
B. Nagarjun ◽  
A. V. Sarma ◽  
G. V. Rama Rao ◽  
C. Rambabu
Keyword(s):  
Molar Volume ◽  
Molecular Interactions ◽  
Binary Data ◽  
Adiabatic Compressibility ◽  
Ethyl Benzoate ◽  
Strong Interactions ◽  
Free Length ◽  
Intermolecular Free Length ◽  
Dimethyl Acetamide ◽  
Liquid Systems

Speeds of sound and density for binary mixtures of ethyl benzoate (EB) with N,N-dimethylformamide (NNDMF), N,N-dimethyl acetamide (NNDMAc), and N,N-dimethylaniline (NNDMA) were measured as a function of mole fraction at temperatures 303.15, 308.15 K, 313.15 K, and 318.15 K and atmospheric pressure. From the experimental data, adiabatic compressibility (βad), intermolecular free length (Lf), and molar volume (V) have been computed. The excess values of the above parameters were also evaluated and discussed in light of molecular interactions. Deviation in adiabatic compressibilities and excess intermolecular free length (LfE) are found to be negative over the molefraction of ethyl benzoate indicating the presence of strong interactions between the molecules. The negative excess molar volume VE values are attributed to strong dipole-dipole interactions between unlike molecules in the mixtures. The binary data of Δβad, VE, and LfE were correlated as a function of molefraction by using the Redlich-Kister equation.

THERMO PHYSICAL PROPERTIES OF TERNARY MIXTURES OF 1-HEXANOL/1- OCTANOL CONTAINING N-N-DIMETHYLFORMAMIDE AND TOLUENE AT 303.15 K

2021 ◽  
pp. 41-43
Author(s):  
T. Sumathi
Keyword(s):  
Experimental Data ◽  
Molecular Interactions ◽  
Acoustic Impedance ◽  
Composition Range ◽  
Adiabatic Compressibility ◽  
Ternary Mixtures ◽  
Acoustical Parameters ◽  
Free Length ◽  
Intermolecular Free Length ◽  
Thermo Physical Properties

In the present work, ultrasonic velocity (u), viscosity (η) and density (ρ) of ternary mixtures of 1-hexonal and 1-octanol with dimethylformamide in toluene at 303.15 K have been measured over the entire composition range. From the experimental data, acoustical parameters such as adiabatic compressibility (β), intermolecular free length (L ), free volume (V ), acoustic impedance (Z), excess adiabatic compressibility , excess free length , excess free f f E E (b ) (L )f volume and excess acoustic impedance have been computed. The variation of these properties with composition are E E (V ) (Z ) f discussed in terms of molecular interactions between unlike molecules of the mixtures.

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.

The Experiment Measuring Method of Polymer Melt Bulk Modulus by PVT Principle

2013 ◽  
Vol 561 ◽  
pp. 75-79
Author(s):  
Hong Xu ◽  
Ke Han ◽  
Ying Liu ◽  
Da Ming Wu
Keyword(s):  
Bulk Modulus ◽  
Free Volume ◽  
Polymer Melt ◽  
Measuring Method ◽  
Reciprocity Principle ◽  
Free Volume Theory ◽  
Temperature And Pressure

Introduced a experiment measuring method of polymer melt bulk modulus. This method based on the PVT reciprocity principle of polymer melt. Depending on liquid attribute of polymer melt, which means pressure changing caused micro variety of volume of certain quality melt in sealed container, polymer melt bulk modulus under the different temperature and pressure could be measured. According with the Polymer Free Volume Theory, the result proved the scientificity of this method.

scholarly journals Ultrasonic Study of Molecular Interactions and Compressibility Behaviour of Samarium Soaps in Benzene-DMSO Mixture

2021 ◽  
Vol 9 (9) ◽  
pp. 71-75
Author(s):  
Darshana Rodric
Keyword(s):  
Molecular Interactions ◽  
Adiabatic Compressibility ◽  
Critical Micellar Concentration ◽  
Solvation Number ◽  
Acoustic Parameters ◽  
Solvent Interaction ◽  
Increase With Increase ◽  
Ultrasonic Measurements ◽  
Number Increase ◽  
Apparent Molar Compressibility

Abstract: Ultrasonic measurements of samarium soaps (palmitate and myristate) have been carried out in a mixture of benzene and DMSO (70%-30% v/v) to determine the critical micellar concentration(CMC), soap-solvent interaction and various acoustic parameters. The results show that ultrasonic velocity, intermolecular free length, adiabatic compressibility, adiabatic molar volume and apparent molar compressibility decrease while specific acoustic impedance, relative association and solvation number increase with increase in soap concentration. The results of ultrasonic measurements have also been explained in terms of well-known equations. Keywords: Ultrasonic measurements, molecular interactions, samarium soaps, compressibility, critical micellar concentration(CMC).

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