What is the temperature of ordinary silicone rubber resistant to low temperature?
Because the molecular structure of silicone rubber is amorphous, the temperature has little influence on its properties, and it has good cold resistance. The brittleness temperature of the general organic rubber is from -20 DEG C to -30 DEG C, while the brittleness temperature of the general silicone rubber is between -60 and -70 degrees centigrade. When the rubber is introduced in 7.5 (mol)% phenyl, brittle temperature of silicone rubber can be reduced to -115 DEG C, remain elastic at -90 DEG C and can use.
Heat resistance of silicone rubber in the air is much better than that of organic rubber, at 150 DEG C, the physical and mechanical properties basically unchanged, semi permanent use, under the temperature of 200 DEG C can be used continuously for more than 10000h; 380 DEG C can be used for some time. Silicone rubber is therefore widely used as rubber parts in high temperature applications.
