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Question
To have practical applications why are cross links required in rubber?
To have practical applications why are cross links required in rubber?
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Solution
Importance of cross-linking:
- A few cross-links are introduced between the polymer chains of natural rubber by the vulcanisation of rubber with sulphur.
- These cross-links help the polymer to retain its original shape after the external force is removed.
- When the rubber gets hot, then due to cross-links, various strands cannot flow past each other, and the rubber retains its shape.
- Thus, these cross-links enhance the elastic property of rubber and make it stiffer.
- For example: In vulcanised rubber, many chains of polyisoprene are covalently bonded to S atoms.
- A few cross-links are introduced between the polymer chains of natural rubber by the vulcanisation of rubber with sulphur.
- These cross-links help the polymer to retain its original shape after the external force is removed.
- When the rubber gets hot, then due to cross-links, various strands cannot flow past each other, and the rubber retains its shape.
- Thus, these cross-links enhance the elastic property of rubber and make it stiffer.
- For example: In vulcanised rubber, many chains of polyisoprene are covalently bonded to S atoms.
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