Silicone rubber main chain is composed of Si-O-SI chain, Si-O-SI bond energy, high temperature resistance, good performance; The side chain is an organic group with large bond Angle, large degree of freedom in orientation, good flexibility and excellent low temperature resistance.

Damping mechanism of silicone rubber

When the polymer viscoelastic material is subjected to stress and strain, the bending molecular chain will be stretched and bent, and the torsion and slip between the molecular chains will occur. When the external force disappears, the elastic part restores part of the molecular chain to its original position, while the viscous part makes the slippage between the chain segments unable to be completely recovered, resulting in permanent deformation, and part of the energy is consumed in the form of heat.

Application of damping material of silicone rubber

Silicone rubber has stable mechanical and damping properties in a large temperature range and outstanding resistance to high and low temperature and aging. It can adapt to the working environment of aerospace products. With the emergence of new high damping silicone rubber and the application of new blending technology silicone rubber is gradually replacing butyl rubber to become the first choice of space damping structures. Polyaniline coated lead titanate (PZT) and conductive carbon black were used to prepare a composite piezoelectric damping material of silicone rubber. Such material is also known as intelligent damping silicone rubber, which has excellent electrical conductivity. When a certain amount of charge appears on the surface of PZT, polyaniline can collect more charge and transfer the charge to the carbon black conductive network to improve the charge conduction efficiency.

It is believed that with the development of science and technology, more and more silicone rubber damping materials will be applied in our life.