Silicone phenyl vinyl gum and silicone methyl vinyl gum are two different silicone materials with some differences in application. Here are some key differences between them:

Chemical structure: The silicone units in silicone phenyl vinyl gum contain phenyl groups (benzene rings), while the silicone units in silicone methyl vinyl gum rubber contain methyl groups (single carbon atoms). Differences in these silicone units lead to differences in material properties.

Physical properties: Due to the existence of the benzene ring structure in silicone phenyl vinyl rubber, it usually has a higher glass transition temperature (Tg) and thermal stability, and also has a lower shear modulus. Silicone methyl vinyl gums typically have lower Tg and higher shear modulus.

Adhesion performance: Silicone phenyl vinyl raw rubber usually has better adhesion performance and adhesion strength due to its different chemical structure, especially in applications that require bonding to surfaces such as glass and metal. Silicone methyl vinyl raw rubber may have better adhesion properties on certain materials, such as some plastic materials.

Application areas: Due to their different physical properties and adhesion properties, silicone phenyl vinyl rubber and silicone methyl vinyl rubber are different in application. Silicone phenyl vinyl gums are typically used in applications requiring high temperature stability and high adhesive strength, such as electronic packaging, optics, automotive components, and more. Silicone methyl vinyl gum is more common in some specific sealing and bonding applications, such as architectural sealing, electronic component packaging, etc.

It should be noted that the selection in a specific application depends on the specific properties required and application conditions. In practical applications, the most suitable material should be selected according to specific requirements.