耐油增容剂POE?g?AN对EVA/PE?LLD电缆料性能影响的研究

采用自制乙烯?辛烯共聚物接枝丙烯腈（POE?g?AN）耐油增容剂，对乙烯醋酸乙烯脂（EVA）/线性低密度聚乙烯（PE?LLD）电缆料的耐油性能、力学性能、电性能进行了研究。结果表明，随着POE?g?AN含量的增加，材料的拉伸强度、耐油性能、电性能均呈先增大后减小的趋势，而断裂伸长率不断增加。当接枝物含量为6 %（质量分数，下同）时，体系中各相间相容性改善效果最好，此时改性电缆料的耐油性、拉伸强度、断裂伸长率、质量、体积变化率的绝对值最小，分别为35.7 %、34.6 %、15.69 %和15.35 %；拉伸强度提升了8.5 %，达到13.02 MPa，断裂伸长率最大为274.15 %；直流击穿场强最高为199 kV/mm，体积电阻率最大为7.84×10¹² Ω·m。

Effect of oil?resistant compatibilizer POE?g?AN on properties of EVA/PE?LLD cable materials

The effects of ethylene?octene copolymer grafted acrylonitrile （POE?g?AN） oil?resistant compatibilizer on oil resistance， mechanical properties and electrical properties of EVA/PE?LLD cable materials were studied. The results showed that with the increase of the amount of POE?g?AN， the tensile strength， oil resistance and electrical properties of the material all showed a trend of increasing or decreasing first， while the elongation at break increased continuously. When the amount of the graft was 6 wt%， The interphase compatibility improvement effect is the best. At this time， the oil resistance of the modified cable material：the absolute value of the tensile strength， the absolute value of elongation at break， the absolute value of mass and volume change rate is the smallest， which are 35.7 %， 34.6 %， 15.69 %，15.35 %，and the tensile strength increased by 8.5 % to 13.02 MPa， and the elongation at break was 274.15 %； the maximum DC breakdown field strength was 199 kV/mm， and the maximum volume resistivity was 7.84×10¹² Ω·m.