The chemical composition of silicon rubber is silicon oxygen, silicon rubber refers to the main chain is composed of silicon and oxygen atoms replacement, silicon atoms are usually connected with two organic groups of rubber, ordinary silicon rubber is mainly composed of methyl and a small number of vinyl silicon oxygen chain, the introduction of phenyl can improve the high and low temperature resistance of silicon rubber, The introduction of trifluoropropyl and cyanide can improve the temperature resistance and oil resistance of silicone rubber.


Silicone rubber resistance to low temperature function is outstanding, generally in -55℃ can still work. After the introduction of phenyl group, the temperature reached -73℃. The heat-resistant function of silicone rubber is also very prominent. It can work for a long time at 180℃, and it can still be elastic for a few weeks or longer when slightly higher than 200℃, and it can withstand high temperature above 300℃ for an instant.



Silica gel is a kind of silicone rubber, attributed to a single component of room temperature vulcanized liquid rubber, once exposed in the air, the silane monomer will produce condensation, form a network structure, the system crosslinked, can not melt and dissolve, elastic, rubber state, together with the adhesive object. Its thermal conductivity was a little higher than ordinary rubber, once cured, it is hard to glue the object space, as if by some chemical books and "silica gel" should be condensation of silica content, to amorphous material, water insolubles and any solvent, non-toxic tasteless, chemical stability, in addition to the strong alkali, hydrofluoric acid does not react with any material.