Materials Reports  2019, Vol. 33 Issue (z1): 444-447 |
| POLYMERS AND POLYMER MATRIX COMPOSITES |
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| Effect of Radiation Modification on Properties of Pb/Cu Polymer Radiation Shielding Materials |
| CHAI Fanchao, CHANG Shuquan, WANG Guohui, YAO Chuqing, DAI Yaodong
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| College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106 |
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Abstract Apolymer radiation shielding material based on polymer ethylene-vinyl acetate copolymer (EVA) and lead powder and copper powder as fil-ler was prepared by melt blending and electron accelerator radiation modification. Based on the characterization of the mechanical properties, electrical properties, radiation shielding properties and cross-linking degree of the material, it can be concluded that it is more appropriate to add 20% by mass of copper powder and 30% of lead powder in EVA. The material was firstly processed with melt blending under 110 ℃ and then irradiated with a radiation does of 50 kGy to achieve great comprehensive properties. The tensile strength of the material after irradiation is 12.25 MPa; the surface resistivity is 1.843 4×1013 Ω, which is two orders of magnitude lower than that of pure EVA; the shielding rate of 59.5 keV emitted by 241Am is 81.315 5%.
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Published: 05 July 2019
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| About author:: Fanchao Chai is currently pursuing a master’s degree in engineering at the School of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, mainly engaged in the field of radiation protection materials.Yaodong Dai received his Ph.D. degree in Nanjing University in 2003. He is currently a professor in Nanjing University of Aeronautics and Astronautics. His research interests are nuclear radiation physics and nuc-lear analysis technology applications, radiation modification of materials and radiation shielding materials research and development. |
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