文献类型：期刊文献

英文题名：Preparation and characterization of tungsten/epoxy composites for γ-rays radiation shielding

作者：Chang, Le[1];Zhang, Yan[1];Liu, Yujian[1];Fang, Jun[1];Luan, Weilin[2];Yang, Xiangmin[3];Zhang, Weidong[3]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tec, Minist Educ, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure & Safety MOE, Shanghai 200237, Peoples R China;[3]E China Univ Sci & Technol, Inst Nucl Technol Applicat, Sch Sci, Shanghai 200237, Peoples R China

年份：2015

卷号：356

起止页码：88

外文期刊名：NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

收录：;EI(收录号：20152000847074);WOS:【SCI-EXPANDED(收录号:WOS:000356990400015)】；

基金：The work was supported by the National Key Basic Research Program of China (973 Program) (No. 2013CB035505), Shanghai Leading Academic Discipline Project (B502).

语种：英文

外文关键词：Gamma-rays radiation; Shielding; Composite; Degradation

摘要：Tungsten/epoxy composites were prepared by blending epoxy resin with different weight percent of tungsten powder. The effect of filler loading on shielding and mechanical properties of composites was investigated by using two different activities of Co-60 source. And radiation degradation mechanism was studied according to the changes of free radicals concentrations, mechanical properties and thermal properties of composites. The results show that with the increment of tungsten loading, shielding property of composites increases. However, with the increase of irradiation dose, thermal stability and mechanical properties of composites decrease firstly, then increase slightly, and decline sharply at the end due to competition reaction between chain scission and cross-linking originated from gamma-rays radiation. (C) 2015 Elsevier B.V. All rights reserved.