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Definition of First Aid | Week 17 Topics1 Quiz
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Rescue Operation | Week 23 Topics1 Quiz
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Materials & their Common Uses (Wood) | Week 36 Topics1 Quiz
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Materials & their Common Uses (Metal) | Week 46 Topics1 Quiz
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Uses of Common Alloys (Brass & Bronze) | Week 5 & 67 Topics1 Quiz
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Uses of Ceramics and Glass (Contd) | Week 7 & 84 Topics1 Quiz
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Uses of Plastics | Week 94 Topics1 Quiz
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Uses of Rubber | Week 103 Topics1 Quiz
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Topic Content:
- Types of Rubber
- Natural rubber
- Synthetic rubber
1. Natural Rubber:
Natural rubber is obtained from the sap of a rubber tree (Hevea brasiliensis). When the rubber tree is tapped, the milky-white liquid obtained is called rubber latex. Natural rubber can be improved upon by adding other chemicals at high temperatures. This process is called vulcanization.
2. Synthetic Rubber:
This class of rubber is known as ‘elastomers’. They are produced from petroleum products. Synthetic rubber cannot be vulcanized.
Rubbers are generally more elastic than plastic. This means that when rubber is stretched, it returns to its original length and size with ease.
Rubber is used to produce:
- Tyres.
- Insulators.
- Shoes, etc.
