Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Gadolinium- and lead-containing functional terpolymers for low energy X-ray protection

  • Zhang, Yu-Juan (School of Chemistry and Chemical Engineering, Yangzhou University) ;
  • Guo, Xin-Tao (Department of Materials Research, AVIC Manufacturing Technology Institute) ;
  • Wang, Chun-Hong (School of Chemistry and Chemical Engineering, Yangzhou University) ;
  • Lu, Xiang An (Guangling College of Yangzhou University) ;
  • Wu, De-Feng (School of Chemistry and Chemical Engineering, Yangzhou University) ;
  • Zhang, Ming (School of Chemistry and Chemical Engineering, Yangzhou University)
  • Received : 2021.04.01
  • Accepted : 2021.06.12
  • Published : 2021.12.25
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Abstract

By polymerization of gadolinium methacrylate (Gd (MAA)3), lead methacrylate (Pb(MAA)2) and methyl methacrylate (MMA), Gd and Pb were chemically bonded into polymers. The X-ray shielding performance was evaluated by Monte Carlo simulation method, and the results showed that the more metal functional organic monomer, the better the shielding performance of terpolymers. When the X-ray energy is 65 keV, Gd (MAA)3-containing polymers have better shielding performance than Pb(MAA)2-containing polymers. Gd could compensate for the weak absorption region of Pb. Therefore, polymers containing both Gd and Pb enhanced shielding efficiency against X-ray in various low-energy ranges. For obtaining terpolymers with uniform monomer compositions, the relationship between the monomer composition of the terpolymers and the conversion level was optimized by calculating the reactivity ratios. The value of reactivity ratios of r (Gd (MAA)3/Pb(MAA)2), r (Pb(MAA)2/Gd (MAA)3), r (Gd (MAA)3/MMA), r (MMA/Gd (MAA)3), r (Pb(MAA)2/MMA) and r (MMA/Pb(MAA)2) was 0.483, 0.004, 0.338, 2.508, 0.255, 0.029. The terpolymers with uniform monomer composition could be obtained by controlling the monomer compositions or conversion levels. The results can provide new radiation protection materials and contribute to the improvement in nuclear safety.

Keywords

Acknowledgement

This study was financially supported by the Aviation Industry Joint Fund (No.6141B05080407) and Natural Science Research Project of Guangling College of Yangzhou University (No. ZKZD18004).

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