What does rubber mean

Rubber (Rubber): It is a kind of reversible deformation elastomeric polymer material. 

Under room temperature,it has the characterrictic of elastic. Under a small external force ,it can produce large deformation,after you remove the external force ,it can restore the status in the previous condition. Rubber belong to a completely amorphous polymer, its glass transition temperature (Tg) is low .And molecular weight tend to be large, more than hundreds of thousands. 

Rubber can be classfied into many different kinds for different purpose.Silicon rubber can be derived from rubber.

Organic silicon material primarily from the silicone oil, silicone rubber, silicone resins and silane coupling agent four major categories of composition, silicone rubber is the production of silicone products, the largest, most widely used of a large class of products. Its main component is a high molecular weight linear polysiloxane. As the Si-O-Si bond is composed of the basic bond of its type, the main connection methyl silicon atom, the introduction of a very small amount of the side chain of the unsaturated group, the interactions among the small, spiral structure of molecules, methyl outwards array can rotate freely, so after curing silicone rubber with excellent resistance to high temperature, weather, water-repellent, electrical insulation, physical inertia and other characteristics, the national defense, health, industrial and agricultural production and people's daily lives were a wide range of applications.