Abstract
AbstractRadiation shielding composites of ethylene‐propylene diene monomer (EPDM), reinforced with tungsten (W) and barium sulphate (BaSO4) in different filler weight (wt%) were synthesized. The effects of W and BaSO4 on gamma and neutron attenuation properties of the composites were studied by experimental methods using 137Cs, 60Co and 252Cf radioactive sources. EPDM composites with W and BaSO4 fillers were also investigated for filler dispersion using scanning electron microscopy and X‐ray radiograph. The experimental results revealed that the incorporation of W and BaSO4 significantly improved the radiation attenuation properties of the EPDM composites. It was observed that the attenuation properties of the composite material increases with higher concentration of the filler. The half‐value layer (HVL), tenth value layer thickness and relaxation length of the composites were found to decrease with increasing concentration of the filler. The results also showed that the attenuation behaviour of 50 wt% BaSO4 filled polymer composite is comparable to that of the composite with 25 wt% W. The developed composite with 75 wt% W filler exhibited the maximum radiation attenuation with lowest HVL thicknesses.
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