| abstract |
The invention relates to the field of insulating materials, and discloses a cross-linkable insulating polyolefin composition, a preparation method and application thereof, a cross-linked insulating polyolefin and an application thereof. The cross-linkable insulating polyolefin composition includes a polyethylene matrix resin, a peroxide cross-linking agent and at least one sulfur-containing auxiliary agent; the sulfur-containing auxiliary agent is a compound containing more than 2 sulfur atoms; relative to 100 In the polyethylene matrix resin in parts by weight, the amount of the peroxide crosslinking agent is 1-2.5 parts by weight, and the amount of the sulfur-containing auxiliary agent is 0.1-5 parts by weight. The crosslinkable insulating polyolefin composition has excellent DC breakdown strength and thermal oxygen aging resistance, and can inhibit the injection and accumulation of space charges. When the composition is used for preparing cables, the long-term running stability of the cables can be significantly improved properties and extend the life of the cable. |