LDPE/PS conductive master batch and preparation method thereof

The invention relates to the technical field of polymer composite materials, in particular to an LDPE/PS conductive master batch and a preparation method thereof. The conductive master batch comprises the following raw materials in parts by weight: 5-15 parts of superconducting carbon black, 70-90 parts of LDPE, 10-30 parts of PS, 5-20 parts of a flexibilizer, 1-5 parts of a compatibilizer, 10-25 parts of a reinforcing agent, 2-4 parts of a lubricant and 0.2-1.5 parts of a catalyst. The conductive master batch is prepared by taking LDPE as main matrix resin, when the conductive master batch is blended with PS resin, the superconducting carbon black is selectively dispersed in the LDPE, meanwhile, a graft LDPE-g-PS is formed in the preparation process by utilizing Friedel-Crafts alkylation reaction of the LDPE and the PS, the compatibility of the conductive master batch and the PS can be improved, meanwhile, the low-concentration superconducting carbon black can form a conductive network, the percolation thres