Rubber is a highly elastic polymer material with reversible deformation. It is flexible at room temperature and can undergo large deformation under the action of small external forces. After being removed, the rubber can be restored to its original shape. Rubber is a completely amorphous polymer with a low glass transition temperature (T g) and a high molecular weight, often greater than a few hundred thousand. The early rubber was latex from plant such as rubber tree, rubber grass and the like, which was made of processed materials with elasticity, insulation, imperviousness and air. High elasticity of the polymer compounds. Divided into two kinds of natural rubber and synthetic rubber. Natural rubber is made from rubber tree, rubber grass and other plants made of plastic processed; synthetic rubber by a variety of monomers derived by polymerization. Rubber products are widely used in all aspects of industry or life.
