| abstract |
The present invention discloses a rubber composition. The rubber composition includes a rubber matrix and a crosslinking system. The rubber matrix includes, in parts by weight, the following components: a branched polyethylene with a content represented as A, in which 0<A≤100, an EPM with a content represented as B, in which 0≤B<100, and an EPDM with a content represented as C, in which 0≤C<100. Based on 100 parts by weight of said rubber matrix, the content of the crosslinking system is represented as D: 1≤D≤15 parts. The crosslinking system includes at least one of a crosslinking agent and an auxiliary crosslinking agent. The branched polyethylene has a degree of branching of not less than 50 branches/1000 carbon atoms, a weight average molecular weight of not less than 50,000, and a Mooney viscosity ML(1+4) at 125° C. of not less than 2. The rubber composition provided by the present invention can effectively solve the problems of low crosslinking efficiency and mechanical strength in the prior art, and simultaneously has good electrical insulation properties and mechanical strength. |