The viscoelasticity of silicone rubber gives it unique advantages in vibration energy dissipation and sound wave absorption, making it an ideal material for vibration and noise reduction. Through material formulation optimization and structural design, its acoustic performance can be significantly enhanced to meet the needs of automotive, construction, industrial equipment, and other fields.

The dynamic mechanical properties of silicone rubber directly affect its vibration-damping effect. Studies show that when the loss factor (tanδ) of silicone rubber is in the range of 0.1-1.0, it can effectively absorb vibration energy. By adjusting the cross-linking density and filler types, the tanδ value of silicone rubber can be regulated. For example, adding 5 phr (parts per hundred rubber) of nano-silica can increase the tanδ of silicone rubber from 0.2 to 0.4 while maintaining a high storage modulus (E' > 1 MPa), making it suitable for vibration-damping components in automotive engine mounts. Additionally, introducing plasticizers with damping properties (such as dioctyl phthalate) can further lower the glass transition temperature (Tg) of silicone rubber, expanding its effective vibration-damping temperature range (-40°C to 120°C).
In terms of sound wave absorption, the design of porous structures in silicone rubber is critical. Silicone rubber foam materials prepared through foaming processes have a porosity of 80%-90% and an average pore size of 50-200 μm. These materials exhibit excellent sound absorption performance in the medium-to-high frequency range (1000-5000 Hz), with a sound absorption coefficient of 0.8-0.9. For example, using silicone rubber foam in building partitions can reduce indoor and outdoor noise by more than 30 dB. Furthermore, combining gradient pore structure designs can achieve broadband sound absorption, covering both low-frequency (200-500 Hz) and high-frequency (5000-10000 Hz) sound wave absorption requirements.



Fluoro Silicone Gum