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采用表面处理和接枝聚合的方法分别制备了以环氧树脂为基体,以钐元素为功能元素的氧化钐/环氧树脂与聚丙烯酸钐/环氧树脂辐射防护材料。用X射线衍射、扫描电镜等方法对比研究了通过表面处理法制得的氧化钐/环氧树脂和通过接枝聚合法制得的聚丙烯酸钐/环氧树脂2种材料样品的微观结构;测试了材料的力学性能,并用多道碘化钠(NaI)γ谱仪和GammaVision软件分析了其辐射防护能力。结果表明:聚丙烯酸钐/环氧树脂复合材料的制备过程相对较复杂,该样品中钐元素分布更均匀,力学性能优于氧化钐/环氧树脂复合材料,但是聚丙烯酸钐/环氧树脂样品中钐的质量分数最多只能提高到11%;对于低能射线,钐元素的含量是影响复合材料屏蔽率的决定性因素,而对于高能射线,钐元素分布对复合材料屏蔽率的影响大于钐元素质量分数带来的影响。
The samarium oxide / epoxy resin and samarium / epoxy resin radiation protective material with epoxy resin as the matrix and samarium as the functional element were prepared by surface treatment and graft polymerization respectively. The microstructure of samarium oxide / epoxy resin prepared by surface treatment and sample of samarium / epoxy resin prepared by graft polymerization were comparatively studied by means of X-ray diffraction and scanning electron microscope. The mechanical properties were evaluated and their radioprotective ability was analyzed using a multi-channel sodium iodide (NaI) gamma spectrometer and GammaVision software. The results show that the preparation process of samarium / epoxy resin composites is relatively complicated. The samarium is more evenly distributed in the sample and the mechanical properties are better than the samarium oxide / epoxy resin composites. However, the samples of samarium polyacrylate / epoxy resin The content of samarium can only increase up to 11%; for low energy ray, the content of samarium is the decisive factor that affects the shielding ratio of the composite, while for high energy ray, the influence of samarium distribution on the shielding ratio of the composite is greater than that of samarium The impact of scores.