scholarly journals Effect of Anionic Surfactant on the Thermo Acoustical Properties of Sodium Dodecyl Sulphate in Polyvinyl Alcohol Solution by Ultrasonic Method

2011 ◽  
Vol 8 (1) ◽  
pp. 77-84 ◽  
Author(s):  
S. Ravichandran ◽  
C. Rathika Thaya Kumari
Keyword(s):  
Polyvinyl Alcohol ◽  
Ultrasonic Velocity ◽  
Sodium Dodecyl Sulphate ◽  
Ultrasonic Method ◽  
Sodium Dodecyl ◽  
Adiabatic Compressibility ◽  
Ultrasonic Waves ◽  
Poly Vinyl Alcohol ◽  
Acoustical Properties ◽  
Polymer Surfactant

The interaction of sodium dodecyl sulphate (SDS) / poly(vinyl alcohol) (PVA) solution was studied by ultrasonic velocity measurements. Ultrasonic velocity, density, viscosity in mixtures of sodium dodecyl sulphate in polyvinyl alcohol was measured over the entire range of composition. From the experimental data, other related thermodynamic parameters,viz., adiabatic compressibility, intermolecular free length, surface tension, relative association, relaxation time, absorption coefficient and internal pressure were calculated. Formations of rods interfere with velocity of ultrasonic waves. Hence the ultrasonic velocity decreases with concentration. These results were interpreted in terms of polymer-surfactant complex reactions.

scholarly journals Studies of Thermo-acoustical Properties of Polyoxyethylene (20) cetyl ether (Brij-58) in Presence of Additives at Different Temperatures

2019 ◽  
pp. 377-389
Author(s):  
B. B. Patil ◽  
G. H. Sonawane
Keyword(s):  
Ultrasonic Velocity ◽  
Adiabatic Compressibility ◽  
Ultrasound Velocity ◽  
Surfactant Molecule ◽  
Acoustical Properties ◽  
Hydrophilic Group ◽  
Brij 58 ◽  
Surfactant Interactions ◽  
Different Temperatures ◽  
Polymer Surfactant

The measurement of ultrasonic velocity and density as a function of temperature and concentration of additives were carried out. The variation of ultrasonic velocity and density of micellar solution of Polyoxyethylene (20) cetyl ether (Brij-58, CMC= 0.0086% w/v) in the presence of polymer PVP and PEO were studied at 298.15, 303.15, 308.15 and 313.15K. Various acoustic parameters such as adiabatic compressibility (?ad), molar volume (Vm), intermolecular free length (Lf), acoustic impedance (Z) and surface tension (?) of aqueous solution of Brij-58 and Brij-58-polymer mixed solutions were derived from these data. The results were discussed on the basis of polymer-surfactant interactions and hydrophobic interaction, which in turn depends upon the structural arrangement of the linkages involved and difference in the chain which binds the hydrophobic and hydrophilic group in the studied surfactant molecule. It was noted that the ultrasound velocity decreases with increase in temperature. The decrease in the value of ?ad and Lf with increase in ultrasonic velocity indicates that there is significant interaction between the surfactant molecule and added polymer PVP and PEO.

scholarly journals The Influence of Surfactant (SDS) on the Adsorption Properties of Polyvinyl Alcohol and Polyethylene Glycol in an Alumina/Solution System

2002 ◽  
Vol 20 (6) ◽  
pp. 573-582 ◽  
Author(s):  
S. Chibowski ◽  
M. Paszkiewicz ◽  
M. Wiśniewska
Keyword(s):  
Polyethylene Glycol ◽  
Polyvinyl Alcohol ◽  
Adsorption Layer ◽  
Sodium Dodecyl ◽  
Adsorption Properties ◽  
Degree Of Hydrolysis ◽  
Ionic Polymers ◽  
Solution System ◽  
Molecular Weights ◽  
Polymer Surfactant

The influence of sodium dodecyl sulphate (SDS) on the adsorption properties of non-ionic polymers, i.e. polyethylene glycol (PEG) and polyvinyl alcohol (PVA), at the Al2O3/solution interface was studied. Measurements for various molecular weights and for various amounts of functional groups on the polymer macromolecules were undertaken and the results obtained discussed in the light of these variations. Studies of the mutual interactions of the polymer–surfactant system in aqueous solution were helpful in explaining the equilibria involved in the Al2O3/polymer solution system in the presence of SDS. The thickness of the adsorption layer was determined by viscometric methods and the influence of the degree of hydrolysis of PVA on the structure of the adsorption layer demonstrated.

scholarly journals The role of polymer flexibility on the interaction with surfactant micelles: poly(vinyl alcohol) and sodium dodecyl sulphate aqueous micelle interactions studied by dynamic fluorescence quenching

1995 ◽  
Vol 73 (11) ◽  
pp. 1765-1772 ◽  
Author(s):  
Jan. Van Stam ◽  
Nadine. Wittouck ◽  
Frans C. De Schryver ◽  
Mats Almgren ◽  
Maria da Graça Miguel
Keyword(s):  
Fluorescence Quenching ◽  
Sodium Dodecyl Sulphate ◽  
Vinyl Alcohol ◽  
Surfactant Concentration ◽  
Sodium Dodecyl ◽  
Critical Aggregation Concentration ◽  
Poly Vinyl Alcohol ◽  
Fluorescence Measurements ◽  
Aggregation Numbers ◽  
Dynamic Fluorescence

The interactions between poly(vinyl alcohol) and the surfactant sodium dodecyl sulphate in aqueous solutions have been investigated by means of static and dynamic fluorescence measurements. By static fluorescence measurements the onset of interaction, the critical aggregation concentration, is determined to be 6.5 mM at 20 °C and 7.0 mM at 40 °C. By dynamic fluorescence measurements without added quencher the influence on the lifetime of the fluorescent probe, pyrene, by the presence of the polymer is investigated. From measurements with an added quencher, dimethylbenzophenone, the surfactant aggregation numbers of the micellar aggregates formed upon interaction between the surfactant and the polymer and the quenching rate constant are obtained. At the two polymer concentrations, i.e., 0.2% and 2.0%, the surfactant aggregation numbers at low surfactant concentration are very small, but increase rapidly with increasing surfactant concentration. Comparisons are made with results from a system where poly(ethylene oxide) instead of poly(vinyl alcohol) is the polymer. Key words: dynamic fluorescence quenching, polymer–surfactant interactions, aggregation numbers.

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 Acoustical Behaviour of Sodium Nitroprusside in Aquo-Organic Solvent Media at 308.15 K

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Monalisa Das ◽  
Smrutiprava Das ◽  
A. K. Pattanaik
Keyword(s):  
Sodium Nitroprusside ◽  
Molar Volume ◽  
Ultrasonic Velocity ◽  
Apparent Molar Volume ◽  
Adiabatic Compressibility ◽  
Quantitative Relationship ◽  
Solvent Mixture ◽  
Acoustical Properties ◽  
Organic Solvent Media ◽  
Apparent Molar Compressibility

Density and ultrasonic velocity have been measured for sodium nitroprusside in aqueous solutions of CH3OH, ethylene glycol, DMSO, and n-propanol solvents at 308.15 K. A quantitative relationship has been established among the acoustical properties like ultrasonic velocity (U), adiabatic compressibility (β), intermolecular free length (Lf), acoustic impedance (Z), apparent molar compressibility (Kϕ), apparent molar volume (Vϕ), limiting apparent molar compressibility (Kϕ0) limiting apparent molar volume (Vϕ0), and their constants (SK,Sv). From the obtained values, molecular interaction study has been made successfully in the light of these acoustical properties through hydrogen bonding in solute and solvent mixture.

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.

Optimization of sodium dodecyl sulphate loading in poly(vinyl alcohol)-water coatings

2019 ◽  
Vol 127 ◽  
pp. 401-407 ◽  
Author(s):  
Ishita Sharma ◽  
Jyoti Sharma ◽  
Sanjeev Ahuja ◽  
Raj Kumar Arya
Keyword(s):  
Sodium Dodecyl Sulphate ◽  
Vinyl Alcohol ◽  
Sodium Dodecyl ◽  
Poly Vinyl Alcohol ◽  
Alcohol Water

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.

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