Comparative Study of Ultrasonic Absorption and Relaxation Behavior of Polar Solute and Non-Polar Solvent

The ultrasonic absorption has been measured at different frequencies 1 MHz to 10 MHz in the binary liquid mixtures of cyclohexane with cinnamaldehyde and methylmethacrylate over the entire range of composition and at five different temperatures 293K, 298K, 303K, 308K and 313K. The result has been used to discuss the nature and strength of intermolecular interactions in the system. In this system structural relaxation plays a predominant role over thermal relaxation process. The increase or decrease in ultrasonic absorption with increase in molar concentration is due to the possible structural relaxation process in this binary liquid mixture. These studies may be important because of their extensive use in the engineering, process industries, textile industries, pharmaceutical industries and nuclear energy industries. Study of propagation of ultrasonic waves and their absorption forms one of the most important methods of investigation of properties of matter in all the three states. It is well known that study of absorption of ultrasonic waves in a medium provides important information about various inter and intra-molecular processes such as relaxation of the medium or the existence of isomeric states or the exchange of energy between various molecular degrees of freedom. Ultrasonic absorption and their deviation from the additive rule provide a better insight into molecular processes. Capsules of cinnamaldehyde are used as food supplements or as dietetic foods to reduce blood sugar levels in diabetes. Cinnamaldehyde change the structure in drug after some periods.