Effect of Nanosilver Particles on the Mechanical Properties of (PVA-PVP) Films

Abstract

In this work,we study the effect of nanosilver particles on mechanical properties of polymer matrix consisting of polyvinyl alcohol and polyvinyl- pyrrolidone. The samples of (PVA-PVP-Ag) nanocomposites were prepared by using casting method. The weight percentages of nanosilver are (0, 4, 8 , 12 and 16) wt.%. , the mechanical properties such as ultrasonic velocity had been measured by ultrasonic waves system at frequency 25 KHz, other mechanical properties had been calculated such as absorption coefficient of ultrasonic waves, relaxation amplitude, specific acoustic impedance, compressibility and bulk modules. The results show that the density , absorption coefficient and the relaxation amplitude are increasing with the increasing of concentrations of the (Ag) nanoparticles ,and the sound wave velocity , specific acoustic impedance , compressibility and bulk modules are decreasing with the increasing of concentrations of the (Ag) nanoparticles .

Keywords: China insurance industry, Foreign fund, Challenge