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Vulcanisation of Rubber

Why sulphur i...

Question

Why sulphur is added to the natural rubber?

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Solution

Natural rubber is soft, sticky and has less tensile strength. It is vulcanized to make it more strong, tough and elastic.
For vulcanization, $3$ to $5$ % sulfur is added to natural rubber and is heated at $100$ to $150^{o} C$ .

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