(1) High temperature performance. The remarkable […]
(1) High temperature performance. The remarkable feature of silicone rubber is high temperature stability. Although the strength of silicone rubber at room temperature is only half of that of natural rubber or some synthetic rubbers, it can still maintain a certain degree of flexibility and recovery at high temperatures above 200 °C. Elasticity and surface hardness, and no significant change in mechanical properties.
(2) Low temperature performance The glass transition temperature of silicone rubber is generally -70~-50 °C, and the special formula can reach -100 °C, indicating that its low temperature performance is excellent. This is of great significance to the aviation and aerospace industries.
(3) The Si-O-Si bond in weather-resistant silicone rubber is very stable to oxygen, ozone and ultraviolet rays, and has excellent weather resistance without any additives.
(4) Electrical properties. Silicone rubber has excellent insulating properties, corona resistance and arc resistance are also very good.
(5) Physical and mechanical properties. The physical and mechanical properties of silicone rubber at room temperature are worse than that of general-purpose rubber, but its physical and mechanical properties are better than general-purpose rubber at a high temperature of 150 °C and a low temperature of -50 °C.
(6) Resistance to oil and chemical reagents. Ordinary silicone rubber has moderate oil and solvent resistance.
(7) Gas permeability. The air permeability of silicone rubber to air, nitrogen, oxygen, carbon dioxide and other gases at room temperature is 30-50 times higher than that of natural rubber.
(8) Physiological inertia. Silicone rubber is non-toxic, tasteless, odorless, non-adhesive to human tissue, has anticoagulant effect, and has very little reactivity to human tissue. Especially suitable as medical material.