Question

whats is vulcanisation of rubber? write the main purpose of vulcanisation of rubber

Answer 1

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Vulcanisation is a chemical process for converting natural rubber or related polymers into more durable materials by the addition of sulphur or other equivalent curatives or accelerators. These additives modify the polymer by forming cross-links between individual polymer chains.

Answer 2

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The process of heating a mixture of raw rubber with sulphur and a appropriate additive at a temperature range between 373K to 415K is called valcanisation.

• Vulcanisation form sulphur crosslinks at the reactive sites of double bond and the rubber gets stiffened.

Example:

Manufacture of tyre include 5% of sulphur.