Prof. Dr. Abdul-Kareem J. Al-bermany, Burak Y. Kadem and* Ehssan Dhiaa J. Al-bermany
dr.Abdulkaream@yahoo.com , burakwh@yahoo.com & ehssan_zah@yahoo.com
Physics Department /College of Science / Babylon University .
*Physics Department /College of Education for Pure Science / Babylon University .



1-Introduction:
Ultrasonic technique is one of the basic non-destructive methods for evaluation of materials and structures. A significant part of every ultrasonic inspection is the way in which the ultrasonic energy is transferred between the transducer and the tested object. Different types of commercial liquids and gels are used as a coupling medium. Sometimes the use of a liquid or gel is undesirable because it may contaminate or penetrate into the material being tested leading to reduction of mechanical properties or corrosion. [1] Ultrasonic technique is good method for studying the structural changes associated with the information of mixture assist in the study of molecular interaction between two species; some of mechanical properties of different polymers were carried by some workers using ultrasonic technique [2]. The absorption of ultrasound in polymer systems is governed by local modes of motion and cooperative because of the existence of strong intermolecular interaction within the polymer. Ultrasonic attenuation measurements are a standard method used to assess the effects of material degradation [3].