Abstract Paper
| Title | : ULTRASONIC INVESTIGATION OF PEG200 AND PEG300 IN CYCLOHEXANONE SOLUTIONS |
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| Author(s) | : D. Daniel Lawrence*, A. Dhayal Raj, V. Anslin Ferby, C. Dominic Savio, S. Bharathi Bernadsha, B. S. Benila, G. Jayakumar, A. Yardily |
| Article Information | : Volume 10 - Issue 01 (June - 2026) , 1217-1230 |
| Affiliation(s) | : Department of Physics, Karunya Institute of Technology and Sciences, Coimbatore 641114, Tamil Nadu, India Department of Physics, Sacred Heart College (Autonomous), Tirupattur 635601, Affiliated with Thiruvalluvar University, Tamil Nadu, India Department of Physics, Scott Christian College (Autonomous), Nagercoil 629003, Tamil Nadu, India Department of Chemistry, Scott Christian College (Autonomous), Nagercoil 629003, Tamil Nadu, India |
Abstract :
The main purpose of the present study is to gain insights into the intermolecular interactions and structure of polymer-solvent systems based upon the ultrasonic investigation of PEG200 and PEG300 solutions in cyclohexanone. The acoustical, thermodynamical and physicochemical properties of the prepared solutions were analyzed using ultrasonic techniques which proved to be effective and non-destructive for analysis at different concentrations (0.25-1.00%). Different parameters like density, viscosity, ultrasonic velocity, the absorption coefficient, the free volume, the internal pressure, the viscous relaxation time, the adiabatic compressibility, the acoustic impedance, Rao’s constant and Wada’s constant were systematically evaluated for both PEG200 and PEG300 systems. From the experimental results, it was observed that the density, viscosity, ultrasonic velocity, absorption coefficient, acoustic impedance, internal pressure, Rao’s constant, Wada’s constant and the viscous relaxation time increase with increase in concentration, while the adiabatic compressibility and free volume decreases with increase in concentration in both the systems. Such differences are clearly indicative of the existence of significant intermolecular interactions between polyethylene glycol molecules and cyclohexanone solvent molecules, and also enhanced cohesive forces between polyethylene glycol molecules. The decrease in free volume and compressibility is consistent with the formation of compact molecular arrangements and with a greater structuring of the solution medium. The enhanced molecular association and the decreased compressibility of the liquid mixtures are also indicated by the observed increase in ultrasonic velocity and acoustic impedance of the liquid mixtures. The comparative analysis reveals that these interaction effects are comparatively stronger for PEG300 as compared to PEG200 in view of its higher molecular weight and longer polymeric chain structure. The interaction between the molecules is greater in PEG300 solution, leading to higher structural compactness and molecular association. The dipole-dipole and hydrogen-bond-assisted molecular association between PEG molecules and the carbonyl group of cyclohexanone are the major forces involved in the interaction. The overall study shows that ultrasonic analysis is a reliable method for studying the molecular interactions in polymer solution and gives information about the acoustical and thermodynamical behaviour of the PEG-Cyclohexanone system.
| Keywords | : Polyethylene Glycol, Cyclohexanone, Ultrasonic Velocity, Intermolecular Interactions, Adiabatic Compressibility, Acoustic Impedance and Thermodynamical Properties. |
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| Document Type | : Research Paper |
| Publication date | : June 16, 2026 |