摘要
以富氢聚乙烯为基材,通过加入高填充量的中子吸收剂——硼化合物来制备高填料、超厚防辐射屏蔽材料。研究了聚乙烯熔体流动速率、碳化硼及氧化钆含量对防辐射屏蔽材料力学性能和屏蔽性能的影响,并探讨了不同成型工艺对材料表观性能的影响。结果表明,选用高熔体流动速率的高压低密度聚乙烯粉料及同等粒径的硼化合物作为填料,通过工艺条件设置和模具改进,能够制备出力学性能优异、内外观质量俱佳的高填料、超厚防辐射屏蔽材料,其中子屏蔽(削弱)系数大于6,伽玛屏蔽(削弱)系数大于8。
Based on rich hydrogen polyethylene with highly-filled neutron absorber boron compound, highly-filled and over-thickness radiation protection materials were prepared. The effects of melt flow rate of polyethylene and content of B4C and GdO on mechanical properties and shielding properties were studied. The effects of different molding process on the material characteristics were discussed. It showed that using powder of low density polyethylene with high melt flow rate and boron compound with a proper particle size, through proper processing condition and improved moulds, highly-filled and over-thickness radiation protection materials were produced with excellent mechanical properties and good quality of appearance. The neutron shielding factor was more than 6, and gamma shielding factor was more than 8.
出处
《中国塑料》
CAS
CSCD
北大核心
2011年第4期65-68,共4页
China Plastics
关键词
填料
厚度
防辐射
屏蔽材料
富氢聚乙烯
filler
thickness
radiation protection
shielding material
hydrogen rich polyethylene
