High shear stress induced desulfurization and modification method for waste and old tyre rubber

The invention relates to high shearing stress induced desulfurization of recycled tyre rubber, and a modified method. Linear high-molecular substances accounting for 5 to 50 percent of the percentage content of the reagent total weight, recycled tyre rubber powder accounting for 49 to 94 percent of the percentage content of the reagent total weight, and stabilization accessory ingredient accounting for 0.01 to 1.8 percent of the percentage content of the reagent total weight are mixed; the mixture is added into a high rotation speed and high shearing type co-rotating twin-screw extruder all together to be molten and extruded to operate the desulfurization reaction; through water cooling, pelleting, and drying or through roll calendering cooling and sheeting out, desulfurization modified regenerated rubber resultant is obtained. The invention integrates the desulfurization reaction, as well as the smelting process, the refining process, and the rubber filtering process into a whole, the efficiency of the desul