Sulfur-free vulcanized low-temperature-resistant elastomer and preparation thereof

The invention provides a preparation method of a sulfur-free vulcanized low-temperature-resistant elastomer. The preparation method specifically comprises the following steps: adding a low-temperature-resistant elastomer, a cross-linking point polymer and an initiator according to a certain mass ratio in a reaction screw extruder, reacting for a certain time, and adding a terminating agent according to a certain mass ratio to obtain the low-temperature-resistant elastomer which has a cross-linking point polymer structure and can be vulcanized without sulfur. Adding the low-temperature-resistant elastomer capable of being subjected to sulfur-free vulcanization, the silicon rubber, the stearic acid, the zinc oxide, the filler and the coupling agent into a closed rubber mixing machine according to a certain mass ratio, mixing for a certain time under the conditions of a certain temperature and a certain rotating speed, and discharging the internally mixed rubber compound. And testing the mechanical property, the