A new low MFR polymer composition, power cable insulation and power cable

摘要

Including polyolefin, peroxide and sulfur-containing antioxidant, the peroxide is present in an amount corresponding to X mmol -OO-/kg polymer composition, and the sulfur-containing antioxidant corresponds to Y mmol -OH /kg polymer composition Present in an amount such that Y ₁ ≤ Y≤ Y ₂ , X ≤ 45 and 0.9 * Y + m ≤ X≤ n-k * Y, wherein Y ₁ is 0.50 and Y ₂ is 10, and m is 0.8, n is 70 and k is 4.7; And the polymer composition has a melt flow index (MFR) of less than 1.7, and the polymer composition is 2,4-diphenyl-4-methyl-1-pentene ), a polymer composition comprising less than 0.05% (wt%) by weight; Crosslinked polymer compositions, and their use, power cable insulation, utility in power cables, high voltage direct current (HV DC) and ultra high voltage direct current (EHV DC) applications, and methods for reducing the electrical conductivity of crosslinked polymer compositions. will be.