Calculating Characteristic Impedance Without Using Symmetricity of Rectangular Coaxial Line

Abstract

In this paper, novel shields for x-rays attenuation are synthesized by using poly-methyl methacrylate (PMMA), polystyrene (PS) and tungsten carbide (WC) nanoparticles. The prepared nanocomposites have light weight, high corrosion resistance, low cost and high attenuation. The effect of tungsten carbide on structural and optical properties of (PMMA-PS) blend was studied for x-rays shielding. The structural properties included the FTIR analysis and optical microscope images. The results showed that the fabricated nanocomposites have high absorbance for high energies which can be used for flexible electronic applications and flexible shielding. The absorbance, absorption coefficient, extinction coefficient, refractive index, dielectric constants and optical conductivity of (PMMA-PS) blend are increased while the transmittance and energy band gap are decreased with the increase in WC nanoparticles concentrations. The results of applications showed the (PMMA-PS-WC) nanocomposites have high attenuation for x-rays.

Low Cost and Excellent Optical Properties of PEO Doped with CoFe2O4 Nanoparticles for Optoelectronics Applications

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Studies on Characteristics of Polymer/Ceramics Nanocomposites for Biomedical and Industrial Applications

“…[22]. Nanocomposites and composite materials have huge applications in the different biomedical, environmental and industrial fields like energy storage and release [23][24][25][26], antibacterial agents [27][28][29][30][31][32][33][34][35], humidity sensors [36][37][38][39], bioenvironmental and radiation shielding [40][41][42][43][44][45][46]. The adding of micro-or nanoparticles of biomaterial to polymer or polymer blend can improve the properties of polymer matrix like electronic properties [47][48][49][50][51][52], optical properties , electrical and dielectric properties [76][77][78][79][80][81][82][83][84][85][86][87][88][89].…”

Synthesis and Morphology Characteristics of PMMA/CeO2/SiO2 Nanostructures for Antibacterial Application

“…The silica, as an additive, is used in coatings, food, and biomedical applications [7]. The oxides' nanostructures and nanooxides-doped polymers were included many applications in different industrial approaches such as sensors, electronics and optoelectronics , and bioenvironmental fields [33][34][35][36][37][38][39].…”