以三羟甲基丙烷三丙烯酸酯为交联助剂,以60Co为辐射源,对三种不同醋酸乙烯酯(Vinyl-acetate,VA)含量的乙烯-醋酸乙烯酯共聚物(Ethylene vinyl-acetate copolymer,EVA)/氢氧化镁混合材料进行了辐照交联。通过对凝胶含量、维卡软化点、氧指数、UL-94垂直燃烧和拉伸性能的测试及热重分析,研究了辐照剂量对EVA/氢氧化镁交联体的交联度、热性能、力学性能和阻燃性能的影响。研究结果表明:VA含量高的EVA/氢氧化镁交联体更容易产生辐射交联;辐照交联后的EVA/氢氧化镁复合材料的抗热变形能力、力学性能及阻燃性能都获得明显改善。热重分析结果表明,60Co辐射明显影响EVA/氢氧化镁的热氧稳定性。 Using trimethylolpropane triacrylate as a crosslinking aid and 60Co as a radiation source, ethylene-vinyl acetate copolymer with three different vinyl acetate contents (VA-VA) , EVA) / magnesium hydroxide hybrid materials were irradiated cross-linked. Through the gel content, Vicat softening point, oxygen index, UL-94 vertical burning and tensile properties of the test and thermogravimetric analysis of the radiation dose on the crosslinking of EVA / magnesium hydroxide cross-linked, heat Performance, mechanical properties and flame retardant properties. The results show that the cross-linked EVA / magnesium hydroxide with high VA content is more likely to produce radiation cross-linking; the thermal deformation resistance, mechanical properties and flame retardancy of the EVA / magnesium hydroxide composite after radiation cross-linking are obtained Significant improvement. Thermogravimetric analysis showed that 60Co radiation significantly affected the thermo-oxidative stability of EVA / MgO.