Radiation shielding properties of poly (methyl methacrylate) / colemanite composite for the use in mixed irradiation fields of neutrons and gamma rays

2019 ◽  
Vol 221 ◽  
pp. 58-67 ◽  
Author(s):  
Tayfun Bel ◽  
Cuneyt Arslan ◽  
Nilgun Baydogan
Keyword(s):  
Methyl Methacrylate ◽  
Gamma Rays ◽  
Radiation Shielding ◽  
Poly Methyl Methacrylate ◽  
Shielding Properties

Effect of different size of PbWO4 particles on EPDM composite for gamma-ray shielding

2020 ◽  
Vol 34 (07) ◽  
pp. 2050046
Author(s):  
Jinghui Fan ◽  
Juying Wu ◽  
Yan Ma
Keyword(s):  
Gamma Rays ◽  
Gamma Ray ◽  
Mechanical Test ◽  
Radiation Shielding ◽  
Reinforced Composites ◽  
Sem Images ◽  
Elongation At Break ◽  
Roll Mill ◽  
The Matrix ◽  
Shielding Properties

Ethylene Propylene Diene Monomer (EPDM) composites filled with 0–400 phr [Formula: see text] (PWO) were prepared by conventional process using a two-roll mill. Surface treatment of the fillers coated with KH570 was conducted to enhance the wettability and lubrication of fillers in the polymer matrix. According to SEM images and mechanical test, both micro- and submicro-fillers disperse homogeneously in the matrix, and adhesion of submicro-fillers to the matrix is stronger than that of micro-fillers. The submicro-PWO composites had better tensile strength and elongation at break than those composites containing micro-PWO powder, but a relatively higher hardness. The photon shielding test was performed to determine the radiation shielding properties of these composites, which showed that attenuation of gamma-rays for the submicro-PWO composites was substantially enhanced compared to micro-PWO reinforced composites.

Optimal radiation shielding capacity and thermal properties of poly(methyl methacrylate) films enhanced with different metal complexes

2021 ◽  
pp. 096739112199849
Author(s):  
Heba A Saudi ◽  
Hossam M Gomaa ◽  
El-Said H El-Mosallamy ◽  
Saeid M Elkatlawy
Keyword(s):  
Methyl Methacrylate ◽  
Metal Complexes ◽  
Thermal Studies ◽  
Atomic Radius ◽  
Radiation Shielding ◽  
Nucleation Agent ◽  
Poly Methyl Methacrylate ◽  
Density Values ◽  
Chain Transfer Polymerization

Samples of pure poly(methyl methacrylate) (PMMA) and PMMA enhanced with metal complexes of Zn, Cd, and Hg were synthesized via catalytic chain transfer polymerization. Structural analysis, by means of XRD, showed the amorphous nature of the studied samples which meant high homogenous dissolution of the metals (Zn, Cd and Hg) into the polymer matrix. Density values increased linearly with respect to atomic radius of the incorporated metals. Addition of such elements causes an increase in mass attenuation coefficients and a remarkable decrease in the Half Value Layer (HVL) values, in comparison to existing standard shielding materials. Thermal studies by DSC indicated highly homogenous internal structure of the studied samples, with slight decrease in the Tg value when introducing metals due to heterogeneous nucleation agent role of the Cd, Zn and Hg. All observations and results suggest the studied materials to be used as promising and proper aprons for medical radiation shielding applications.

Physical-radiation shielding properties of concrete contains colemanite and ulexite

2020 ◽  
pp. 1420326X2096797
Author(s):  
Nazım Uçar ◽  
Adnan Çalık ◽  
Muhammet Emre ◽  
Iskender Akkurt
Keyword(s):  
Elastic Modulus ◽  
Flexural Strength ◽  
Gamma Rays ◽  
Construction Material ◽  
Radiation Shielding ◽  
Ordinary Concrete ◽  
Important Phenomenon ◽  
Shielding Properties

Radiation is an important phenomenon as it is used in a variety of different fields. However, its possible hazardous effect should be taken into account and it should be shielded. As the concrete is a widely used construction material, the mechanical and radiation shielding properties of concretes containing boron-bearing aggregate additives have been studied. The results show that the addition of colemanite or ulexite into concrete has significant effects on density, workability, compressive and flexural strength, elastic modulus and radiation shielding. The results also show that concrete containing colemanite or ulexite is no more effective in the attenuation of gamma rays than ordinary concrete.

scholarly journals Thermal, Mechanical and UV-Shielding Properties of Poly(Methyl Methacrylate)/Cerium Dioxide Hybrid Systems Obtained by Melt Compounding

Polymers ◽  
2015 ◽  
Vol 7 (9) ◽  
pp. 1638-1659 ◽  
Author(s):  
María Reyes-Acosta ◽  
Aidé Torres-Huerta ◽  
Miguel Domínguez-Crespo ◽  
Abelardo Flores-Vela ◽  
Héctor Dorantes-Rosales ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Hybrid Systems ◽  
Cerium Dioxide ◽  
Poly Methyl Methacrylate ◽  
Uv Shielding ◽  
Melt Compounding ◽  
Shielding Properties

BaSO4/Polyvinyl Alcohol Composites for Radiation Shielding

2015 ◽  
Vol 804 ◽  
pp. 3-6 ◽  
Author(s):  
Voranuch Thongpool ◽  
Akapong Phunpueok ◽  
Naris Barnthip ◽  
Sarawut Jaiyen
Keyword(s):  
Polyvinyl Alcohol ◽  
Optical Density ◽  
Gamma Rays ◽  
Gamma Ray ◽  
Radioactive Source ◽  
Radiation Shielding ◽  
Specimen Thickness ◽  
Attenuation Coefficients ◽  
X Ray ◽  
Shielding Properties

The gamma ray and X-ray shielding properties of PVA containing different proportions of BaSO4 as an aggregate have been investigated. The photon linear attenuation coefficients were measured by using 241Am radioactive source (59.54 keV). Gamma rays were counted by a NaI(Tl) detector. It was found that the shielding efficiency increased when increasing the amount of BaSO4 and specimen thickness. The linear attenuation coefficients were 0.085, 0.125, 0.179, and 0.189 for 0.2, 0.4, 0.6, and 0.8%w/v of BaSO4. The X-ray attenuation test was performed using the diagnostic X-ray machine for energy of 45 kVp. The optical density of X-ray films was investigated. The results showed that the optical density of X-ray film decreased when increasing the amounts of BaSO4.

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