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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 Plastics
- Thermosetting
- Thermoplastics
The two key categories of plastic are thermoplastics and thermosetting plastics (thermosets).
Thermosetting Plastic:
This is the type of plastic produced from thermosetting resin. This type of plastic cannot be remoulded when exposed to heat. Examples are polyester, amino formaldehyde, and bakelite used for producing the handles of enamel pots and dishes.
Thermoplastic:
These are plastics made from resin that does not set rigidly by heating. They soften on heating and can be remoulded into other shapes. e.g. plastic buckets.
