Abstract Paper

Journal of Functional Materials and Bio-molecules

Title	: COMPATIBILITY STUDIES ON POLYBLENDS OF BUTYL RUBBER WITH PPG AND PEG USING ULTRASONIC TECHNIQUES
Author(s)	: D. Daniel Lawrence, C. Dominic Savio, G. Jayakumar, V. Anslin Ferby, B. S. Benila, S. Bharathi Bernadsha, A. Dhayal Raj
Article Information	: Volume 9 - Issue 02 (December - 2025) , 1077-1084
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, Tamil Nadu, India
	: Department of Physics, Scott Christian College (Autonomous), Nagercoil 629003, Tamil Nadu, India

Abstract :

The current experiment examines the incompatibility between butyl rubber (BR) and polypropylene glycol (PPG) and polyethylene glycol (PEG) using ultrasonic methods, which are sensitive probes used to study molecular interactions during polymer blends. Parameters of the ultrasound were calculated as adiabatic compressibility (β), free volume (Vf) and internal pressure (Πi) of BR-PPG and BR-PEG blends at 0.5 and 1% percentages in 303 K. The fundamental knowledge of the miscibility and structural behaviour of the polyblends is provided by the methodical dependence of these parameters on blend composition. A steady decrease in β and Vf and an increase in Πi with increase of polyether concentration in the blends imply increased intermolecular interactions and better molecular packing in the blends. The comparative analysis will show that PEG exhibits rather higher compatibility with BR as compared to PPG, which can be attributed to the fact that PEG is more polar, and it is more likely to undergo intermolecular associations. Ultrasonic evidence indicates that the BR-PPG and BR-PEG systems have homogeneous interaction with no phase separation, and hence confirm miscibility over the whole compositional range. The trends observed are in line with the known polymer-polyether interaction theories and support the applicability of ultrasonic methods in the assessment of compatibility in elastomeric systems. Altogether, the current research highlights the efficiency of ultrasonic measurements in identifying the interaction dynamics that are difficult to notice, and provides a scientific basis to the development of BR-contained polymer blends with increased performance properties. The results can be used to add important knowledge to the field of future material design and provide a validating framework of how ultrasonic methods could be used to study polymer compatibility.

Keywords	: Ultrasonic Techniques, Butyl Rubber (BR), Polymer Blend Compatibility, Polypropylene Glycol (PPG), Miscibility Analysis, Polyethylene Glycol (PEG), Adiabatic Compressibility, Liquid Mixtures.
Document Type	: Research Paper
Publication date	: January 02, 2026