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JSS2: BASIC TECHNOLOGY - 1ST TERM

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  1. Definition of First Aid | Week 1
    7 Topics
    |
    1 Quiz
  2. Rescue Operation | Week 2
    3 Topics
    |
    1 Quiz
  3. Materials & their Common Uses (Wood) | Week 3
    6 Topics
    |
    1 Quiz
  4. Materials & their Common Uses (Metal) | Week 4
    6 Topics
    |
    1 Quiz
  5. Uses of Common Alloys (Brass & Bronze) | Week 5 & 6
    7 Topics
    |
    1 Quiz
  6. Uses of Ceramics and Glass (Contd) | Week 7 & 8
    4 Topics
    |
    1 Quiz
  7. Uses of Plastics | Week 9
    4 Topics
    |
    1 Quiz
  8. Uses of Rubber | Week 10
    3 Topics
    |
    1 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.

Natural Rubber_
Natural Rubber.

2. Synthetic Rubber:

This class of rubber is known as ‘elastomers’. They are produced from petroleum products. Synthetic rubber cannot be vulcanized.

 

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