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The Door Buzzer
- Plastics are a class of material that are usually synthesised from fossil fuels like oil or natural gas.
- Plastics are made up of molecules called polymers.
- Polymers are very long chains of atoms
- Plastics are so named, because they can deform (stretch, squash, bend) without breaking.
- There are many different types of plastic.
- Use online resources to list some of the uses of the following plastics
- Polyvinyl chloride
- There are two main classes of plastic:
- Thermosetting polymers.
- When we heat a thermoplastic, it softens and becomes malleable. This allows us to alter its shape, which will remain after we cool it down.
- When we heat a thermosetting polymer after it has cooled for the first time, it does not soften and so cannot be reshaped.
- Have a look at this video from the 1940s
- Explain, with diagrams, what are the differences between thermoplastics and thermosetting polymers.
- Silver - A reasonable attempt at describing the difference between the types of plastics.
- Gold - A good explanation, with 3 examples of each.
- Platinum - An excellent explanation of the different uses of several types of plastics.