*2.2. Sample Preparation*

First, the raw materials were weighed according to the weights shown in Table 1. Then, to evenly disperse the white oil 250N in the sample, we first mixed the white oil 250N with SEBS and SBS and stirred for 5 min before letting it stand. After SEBS fully absorbed the white oil, we added the pre-mixed mixture to the torque rheometer (chamber temperature 170 ◦C, rotation speed 70 rpm). When the torque value was stable, we continued to add the methyl vinyl silicone rubber. We waited for the torque value to stabilize and then added the silane coupling agent, hydrogen-containing silicone oil, and platinum catalyst in sequence to allow for the dynamic vulcanization of the mixture in the cavity. When the torque value rose due to the cross-linking of the mixture in the cavity and then stabilized, the blend was taken out and placed on a flat vulcanizing machine to be pressed for tableting (pressing time was 5 min) to obtain a sample tablet with a thickness of 2 mm.


**Table 1.** TPSiV dynamic vulcanization experimental formula (unit: phr) (a).

7 60 20 20 0 0.5 8 70 15 15 0 0.5 (a) Unless otherwise specified, all samples contain 10 units of white oil and 1 unit of hydrogen-containing silicone oil.

2 50 25 25 1 0.5 3 60 20 20 1 0.5 4 70 15 15 1 0.5 5 40 30 30 0 0.5 6 50 25 25 0 0.5
