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Th∞retical I)ete耐nation of Physical Properties For Poly VinyI Pyrolidone

Authors: Raouf M.Raouf --- Khalid Mershed --- Zeyad D. Kadhim
Journal: Journal of College of Education مجلة كلية التربية ISSN: 18120380 Year: 2010 Issue: 5 Pages: 221-253
Publisher: Al-Mustansyriah University الجامعة المستنصرية


In this research A simple model has been presented for polyvinylpyrrolidone aqueous solutions to predict wave amplitude in C.R.O byusing Ulrasonic technician (ho,, "non-radiated", hri, "irradiated", andh*i, ils a function of h**). The use of this model reflects a good resultfor the samples of PVPD aqueous solutions, which was radiated withgaflrma rays of 150 Rad/min, dose for 22 min at room temperature,therefore this factor, will be constant in this work. These data wereused to develop a new method to predict the wave amplitude in C.R.O.The model can be used to calculate the ho,, & h"i, for a given primaryamplitude of wave in C.R.O ( h-o, h*), the distance between receiverand ultrasonic wave sender x, and PVPD concentration v. From thismodel we can calculate absorption coefficient (c) for non radiated andirradiated PVPD as a function of h,*, h'i,, and v. This predictionmethod give a good agreement with the measured values, where theabsolute average error for wave amplitude in C.R.O for non-radiatedh,- is (1.02), wave amplitude for iradiated in C.R.O h*i' is (0.14), andwave amplitude in C.R.O hxir as a function of h"* is (0.25). Theabsolute average error for non-radiated (a) is (0.45), and irradiated (c)is (1.04) for all data points of PVPD.


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