What is rubber ? Explain.

Rubber is a polymer with the property of elasticity. There are two categories of rubber: natural rubber obtained from the rubber tree and synthetic rubber derived from petrochemicals. The characteristic property of elasticity of natural rubber is maintained between temperatures 283 K to 333 K or higher. At the temperature below 283 K, it remains brittle while it becomes soft at temperatures 333 K or higher. Due to property of elasticity, it is used in many fields.