Effect of electron beam (EB) irradiation on the properties of ethylene vinyl acetate (EVA)/ethylene–propylene–diene monomer (EPDM) (50/50) blends was studied. The blends were firstly melt-compounded at 130°C followed with being irradiated using 4.0 MeV EB energy at doses ranging from 0 kGy to 200 kGy. It is found that the dosage of irradiation plays a key role in the properties of the blends. With the increasing dosage of irradiation, tensile strength and thermal stability were enhanced. The irradiation exerts a cross-linking effect on the blends, and the increase in density is responsible for the enhanced properties. Dynamic mechanical and thermal analyses and morphology indicate that irradiation does not play any negative role in the compatibility between EVA and EPDM. Hot set test reveals that irradiation could improve the heat deformation property of blends. Thus, it is reasonable and interesting to modify EVA/EPDM blends using EB irradiation to further increase its properties.

研究了电子束（EB）辐照对乙烯乙酸乙烯酯（EVA）/乙烯-丙烯-二烯单体（EPDM）（50/50）共混物性能的影响。首先将混合物在130℃下熔融混合，然后使用4.0 MeV EB能量以0 kGy至200 kGy的剂量进行辐照。发现辐照的剂量在共混物的性质中起关键作用。随着辐照剂量的增加，抗张强度和热稳定性得到增强。辐射对共混物产生交联作用，密度的增加是增强性能的原因。动态力学和热分析以及形态表明，辐照对EVA和EPDM之间的相容性没有任何负面作用。热定形试验表明，辐照可以改善共混物的热变形性能。因此，使用EB辐射改性EVA / EPDM共混物以进一步提高其性能是合理且有趣的。