辐射改性对铅/铜高分子辐射屏蔽材料性能的影响

材料导报

2019, Vol. 33

Issue (z1): 444-447

高分子与聚合物基复合材料

辐射改性对铅/铜高分子辐射屏蔽材料性能的影响

柴凡超, 常树全, 王国辉, 姚初请, 戴耀东

南京航空航天大学材料科学与技术学院,南京 211106

Effect of Radiation Modification on Properties of Pb/Cu Polymer Radiation Shielding Materials

CHAI Fanchao, CHANG Shuquan, WANG Guohui, YAO Chuqing, DAI Yaodong

College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106

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摘要采用熔融共混和电子加速器辐射改性方法,制备了以高分子材料乙烯-醋酸乙烯共聚物(EVA)为基底、铅粉和铜粉为填料的高分子辐射屏蔽材料。综合该材料的力学性能、电性能、辐射屏蔽性能以及交联度的表征结果,可以得出:在EVA中添加质量分数为20%的铜粉和30%的铅粉,采用熔融共混法在110 ℃下共混,并给予材料50 kGy的辐射剂量照射,可制得综合性能良好的高分子屏蔽材料。其中,该材料在接受辐照后的抗拉强度达到12.25 MPa;表面电阻率为1.843 4×10¹³ Ω,相较纯EVA下降了两个数量级;对²⁴¹Am所放出的59.5 keV的射线的屏蔽率可达81.315 5%。

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关键词: 乙烯-醋酸乙烯共聚物(EVA) 电性能辐射屏蔽辐射改性

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%.

Key words: polymer ethylene-vinyl acetate copolymer (EVA) electrical performance radiation shielding irradiation modification

出版日期: 2019-05-25 发布日期: 2019-07-05

ZTFLH:	X34
	X946

作者简介: 柴凡超,目前于南京航空航天大学材料科学与技术学院攻读工程硕士学位,主要从事辐射防护材料领域的研究。戴耀东,南京航空航天大学材料科学与技术学院,教授。2003年毕业于南京大学,获物理学博士学位。2003年至今,工作于南京航空航天大学。主要从事核辐射物理及核分析技术应用、材料的辐照改性和辐射屏蔽材料的研究和开发工作。承担或主持完成各类基金项目十余项,在国内外著名刊物发表论文30余篇,申请专利4项。yd_dai@126.com

引用本文:

柴凡超, 常树全, 王国辉, 姚初请, 戴耀东. 辐射改性对铅/铜高分子辐射屏蔽材料性能的影响[J]. 材料导报, 2019, 33(z1): 444-447.
CHAI Fanchao, CHANG Shuquan, WANG Guohui, YAO Chuqing, DAI Yaodong. Effect of Radiation Modification on Properties of Pb/Cu Polymer Radiation Shielding Materials. Materials Reports, 2019, 33(z1): 444-447.

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http://www.mater-rep.com/CN/ 或 http://www.mater-rep.com/CN/Y2019/V33/Iz1/444

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