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首页> 外文期刊>Journal of Applied Polymer Science >Ethylene-propylene diene monomer-based polymer composite for attenuation of high energy radiations
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Ethylene-propylene diene monomer-based polymer composite for attenuation of high energy radiations

机译：乙烯 - 丙烯二烯单体基聚合物复合材料，用于衰减高能辐射

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摘要

Radiation 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 Cs-137, Co-60 and Cf-252 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.
机译：合成了不同填充量（wt%）的钨（W）和硫酸钡（BaSO4）增强三元乙丙橡胶（EPDM）辐射屏蔽复合材料。利用Cs-137、Co-60和Cf-252放射源，通过实验方法研究了W和BaSO4对复合材料伽马和中子衰减性能的影响。使用扫描电子显微镜和X射线照片研究了W和BaSO4填料的EPDM复合材料的填料分散性。实验结果表明，W和BaSO4的加入显著改善了EPDM复合材料的辐射衰减性能。结果表明，随着填料浓度的增加，复合材料的衰减性能增加。随着填料浓度的增加，复合材料的半值层（HVL）、第十值层厚度和松弛长度减小。结果还表明，50 wt%BaSO4填充聚合物复合材料的衰减性能与25 wt%W的复合材料相当。所开发的填充75 wt%W的复合材料在最低HVL厚度下表现出最大的辐射衰减。

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