With the increase of phenyl content, the hardness, tensile strength, elongation at break and compressive permanent deformation of silicone rubber increase. This is because phenyl is a large volume of rigid side group, which increases the molecular chain rigidity and intermolecular force of silicone rubber, but also reduces the regularity of the molecular chain, hindering the recovery of the molecular chain. They also discussed the effect on damping properties, and the experiment found that the introduction of phenyl improved the damping properties of silicone rubber, while increasing with the increase of phenyl content. Su Zhengtao et al. prepared high damping silicone rubber from low phenyl silicone rubber, which is suitable for use in harsh environment where the heat generation is too high due to large stress and strain. Tang Xiaodou et al. discussed the relationship between the glass transition temperature and the material damping properties through dynamic mechanical tests of viscoelasticity of hot-vulcan phenyl silicone rubber with different structural compositions, and proposed that there is a secondary transition between -50℃ and +150℃, which mainly affects the damping properties of silicone rubber, but has little relationship with the glass transition temperature. It is also pointed out that the degree of crosslinking plays an important role in damping performance of silicone rubber. Liu Yu et al. prepared the blend of phenyl silicone rubber and polyurethane by physical blending method, which can obviously improve the mechanical properties of phenyl silicone rubber and maintain good damping properties at the same time.

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