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- W2188878953 abstract "The PVA-Palm fiber composite polymer membranes were prepared by sol-gel casting method with different ratios of concentration, in order to study the mechanical properties of these composite ultrasonic measurements of variable frequencies (25,30,35,40,45 and 50 kHz) were performed , these properties are ultrasonic velocity ,density ,compressibility ,specific acoustic impedance ,relaxation time, relaxation amplitude , bulk modulus, shear viscosity ,absorption coefficient and transmittance. Results shows that all these properties were decreasing with concentration of palm fiber in composite ; so palm powder keep the degradations polymer chain isolated and their roots not interact again to forming entanglement interactions, this reason made these vales reduced except that scattering were dominant so we pointed that this composite more effective to reflect and scattered ultrasonic waves." @default.
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- W2188878953 date "2011-01-01" @default.
- W2188878953 modified "2023-09-27" @default.
- W2188878953 title "A Study of Some Mechanical Properties of Iraqi Palm Fiber-PVA Composite by Ultrasonic" @default.
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