20 | P a g e www.iiste.org Study the Rheological and Mechanical Properties of PVA/NH4Cl by Ultrasonic Prof. Dr. Abdul-Kareem Jawad Rashid Rawaa Mizher Obiad Burak Yahya Kadem 1. University of Babylon, College of Science, Physics Department, Babylon, Hilla -Najif Street, Iraq 2. University of Babylon, College of Science, Physics Department, Babylon, Hilla -Najif Street, Iraq 3. University of Bab...