The semi-conductive shielding layer is an important part of the high-voltage cable, playing a role in uniform electric field and reducing the air gap at the interface. The overall performance of the cable is affected by the semi-conductive shielding layer with different base resin composition. The matrix resins of ethylene-vinyl acetate (EVA), ethylene-ethyl acrylate (EEA) and ethylene-butyl acrylate (EBA) were used to prepare the semi-conductive shielding materials of CB/EVA, CB/EEA and CB/EBA. The influences of different matrix resins on the chemical, electrical, thermal and mechanical properties of the shielding materials were investigated. The results show that CB has the best dispersion in EBA resin and the worst dispersion in EEA resin. The temperature inflection points of CB/EVA, CB/EEA and CB/EBA shielding materials are 90°C, 100°C and 110°C, respectively, and the CB/EBA shielding material has the lowest resistivity and the weakest positive temperature coefficient effect at room temperature. The thermal conductivity of all three matrix resins is smaller than that of the shielding material, the thermal conductivity of CB/EVA and CB/EBA shielding materials show a slow increase with temperature, and the CB/EEA shielding material is the least affected by the temperature. The mechanical properties of the three matrix resins and the three shielding materials are EBA > EVA > EEA, among them the stress of CB/EBA shielding material is 31.0 MPa and the strain is 570%. This work has important reference significance for the selection of shielding layer matrix resin and material formulation in engineering applications.

中文翻译：

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基体树脂组分对高压电缆半导体屏蔽材料性能的影响

半导电屏蔽层是高压电缆的重要组成部分，起到均匀电场和减小界面气隙的作用。不同基础树脂成分的半导体屏蔽层会影响电缆的整体性能。以乙烯-醋酸乙烯酯(EVA)、乙烯-丙烯酸乙酯(EEA)和乙烯-丙烯酸丁酯(EBA)为基体树脂制备了CB/EVA、CB/EEA和CB/EBA半导体屏蔽材料。研究了不同基体树脂对屏蔽材料化学、电学、热学和机械性能的影响。结果表明，CB在EBA树脂中分散性最好，在EEA树脂中分散性最差。CB/EVA、CB/EEA和CB/EBA屏蔽材料的温度拐点分别为90℃、100℃和110℃，CB/EBA屏蔽材料具有最低的电阻率和最弱的正温度系数室温下的效果。三种基体树脂的导热系数均小于屏蔽材料的导热系数，CB/EVA和CB/EBA屏蔽材料的导热系数随温度呈现缓慢增加的趋势，且CB/EEA屏蔽材料受温度影响最小。温度。三种基体树脂和三种屏蔽材料的力学性能依次为EBA>EVA>EEA，其中CB/EBA屏蔽材料的应力为31.0 MPa，应变为570%。该工作对于工程应用中屏蔽层基体树脂的选择和材料配方具有重要的参考意义。