Rubber is a kind of high elastic polymer material with reversible deformation, which is elastic at room temperature, can produce large deformation under the action of small external force, and can recover to its original state after removing external force. Rubber is a completely amorphous polymer with a low glass transition temperature (Tg) and a large molecular weight of several hundred thousand.

Rubber is divided into natural rubber and synthetic rubber. Natural rubber is made from rubber tree, rubber grass and other plants after extracting gum; Synthetic rubber is polymerized from various monomers. Rubber products are widely used in all aspects of industry or life.