Rubber refers to a highly elastic polymer material with reversible deformation. It is elastic at room temperature and can be deformed under a small external force. It can be restored to its original state after removing external force. Rubber is a completely amorphous polymer with a low glass transition temperature (T g) and a large molecular weight, often greater than several hundred thousand.
The early rubber was made from latex of rubber trees, rubber grass and other plants, and was made of elastic, insulating, water-impermeable and air-resistant materials. Highly elastic polymer compound. Divided into two kinds of natural rubber and synthetic rubber. Natural rubber is processed by extracting gum from plants such as rubber trees and rubber grasses; synthetic rubber is obtained by polymerization of various monomers. Rubber products are widely used in various aspects of industry or life.