Natural rubber

Vulcanized rubber

 (1) it is soft and sticky

Vulcanized rubber is hard and non-sticky.

 (2) Natural rubber has low tensile strength.

Vulcanized Rubber has high tensile strength.

 (3) Natural rubber has low elasticity.

Vulcanized Rubber has high elasticity.

 (4) Natural rubber can be used over a narrow range of temperature (from 10° to 60°C).

Vulcanized Rubber can be used over a wide range of temperature (-40° to 100°C).

 (5) Natural rubber has low wear and tear resistance.

Vulcanized Rubber has high tear and wear resistance.

 (6) Natural rubber is soluble in solvents like ether, carbon, tetrachloride, petrol, etc.

Vulcanized Rubber is insoluble in all the common solvents.