The use of phenyl silicone rubber with different structures will directly affect the performance of the final product, but for methyl phenyl vinyl rubber, the vinyl content and distribution will also greatly affect the physical properties and vulcanization properties of the vulcanized rubber; different phenyl contents will greatly affect the low temperature resistance, damping performance and radiation resistance of the vulcanized rubber.



(1) Vinyl content

As the vinyl content in the raw rubber increases, the crosslinking ratio increases, the hardness and tensile strength of the vulcanized rubber also increase accordingly, and the elongation and compression set decrease.

(2) Vinyl position and distribution

The vulcanized rubber obtained from the raw rubber terminated with vinyl has better performance than the general-purpose raw rubber terminated with non-vinyl. This is because the terminal vinyl has a molecular chain growth effect during crosslinking, thereby improving the physical and mechanical properties of the vulcanized rubber. Our company uses D4 as raw material to make raw rubber, and the vinyl raw rubber on the side chain is more evenly distributed, thereby increasing the crosslinking density and better rebound.

(3) Phenyl content

The different phenyl content in raw rubber determines the functionality of phenyl silicone. Raw rubber with low phenyl content has the best low temperature resistance, and medium phenyl content can significantly improve the damping performance of silicone; high phenyl silicone can significantly reflect the anti-radiation performance of silicone.