Question

Discuss the main purpose of vulcanization of rubber

Answer 1

Vulcanization of rubber is a process of improvement of the rubber elasticity and strength by heating it in the presence of sulfur, which results in three-dimensional cross-linking of the chain rubber molecule bonded to each other by sulfur atoms.This process was invented by Charles Goodyear.

Answer 2

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Here is your answer,

→ The process of heating natural rubber with sulphur to improve its properties is called vulcanization. During vulcanization, sulphur cross links are formed which make the rubber hard, tough and posses greater tensile strength. It has an excellent elasticity, low water absorption tendency, resistance to oxidation and organic solvents.

→ The double bonds in the rubber acts as reactive sites. The allylic CH₂ group and α to C = C are also active. During vulcanization these active sites are remove because of cross-links are formed by sulphur at these double bonds. As results, rubber becomes stiff and inter molecular movements of rubber springs is prevented. Increase of S content increases the stiffness.


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