Key word：Rubber
Rubber is a high elastic polymer material with reversible deformation, which is elastic at room temperature and can produce large deformation under a small external force, and can be restored to its original state after removing the external force. Rubber is a completely amorphous polymer. Its glass transition temperature (T g) is low and its molecular weight is often large, which is more than hundreds of thousands.
Early rubber was made of latex from rubber trees, rubber grass and other plants, which was processed into materials with elasticity, insulation, impermeability and air. It is a high elastic polymer compound. Rubber is divided into natural rubber and synthetic rubber. Natural rubber is made from rubber tree, rubber grass and other plants after extracting gum, while synthetic rubber is obtained from various monomers through polymerization. Rubber products are widely used in industry and life.
