What is the Difference Between Natural Rubber and Vulcanized Rubber?

The main difference between natural rubber and vulcanized rubber lies in their mechanical properties and the vulcanization process. Here are the key differences:

Natural Rubber:

• Obtained as latex from rubber trees.
• Composed of polyisoprene molecules.
• Has less desirable properties in its raw state.
• Slightly stronger and has less odor compared to synthetic rubber.
• Less resistant to heat and age compared to synthetic rubber.

Vulcanized Rubber:

• Formed after the vulcanization of natural rubber.
• Contains crosslinks between polymer chains, making it a thermoset.
• Much stronger, more elastic, and more durable than natural rubber.
• Can withstand greater pressure and stress.
• Superior mechanical properties compared to natural rubber.
• Less sticky than natural rubber.

The vulcanization process involves adding and heating rubber with sulfur to improve its elasticity and create a more durable material. This process enhances the natural rubber's benefits without weaknesses at a molecular level, making vulcanized rubber far less susceptible to damage or deformation. Vulcanized rubber is commonly used in products like tires due to its durability and water resistance.

Comparative Table: Natural Rubber vs Vulcanized Rubber

Here is a table comparing the differences between natural rubber and vulcanized rubber:

Natural rubber is obtained as latex from rubber trees, while vulcanized rubber is processed natural rubber that has been treated with heat and sulfur or another suitable method to improve its properties. Natural rubber is soft and sticky, while vulcanized rubber is hard and non-sticky. Vulcanized rubber has a higher tensile strength, but natural rubber has good abrasion resistance. Natural rubber is a thermoplastic material, while vulcanized rubber is a thermoset material. The temperature resistance of natural rubber ranges from -40 to 80°C, and it has a short-time peak temperature of 100°C.