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Learn about Thermosetting & thermoforming plastics (Polymers)

Learn about Thermosetting & thermoforming plastics (Polymers). You will be tested on this topic. It is important to be aware of what plastics are and how/ where they are used. Use the knowledge you have learnt in previous lessons. Key words. Plastics, Thermo forming, Thermo setting,

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Learn about Thermosetting & thermoforming plastics (Polymers)

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  1. Learn about Thermosetting & thermoforming plastics (Polymers) • You will be tested on this topic • It is important to be aware of what plastics are and how/ where they are used Use the knowledge you have learnt in previous lessons

  2. Key words Plastics, Thermo forming, Thermo setting, Polypropylene, Polymers

  3. Starter Take a few minutes to look around the room and identify some everyday plastics. Can you find the following objects and decide what type of plastic they are made from? Polypropene • Chairs • Jumper • Comb • Carrier bag • Pencil case Acrylic Nylon Polyethene Neoprene

  4. Where do plastics come from? • - • Natural plastics, are found in animal horns (Casein glue), trees (latex, rubber) • Syntheticplastics, are all modern plastics the source of these plastics is crude oil. • Made by a process called Polymerisation

  5. Types of plastics Thermoforming Plastics can be reheated and therefore reshaped. • Soften when heated • Can be reshaped • More commonly used in school • CAN be recycled Thermosetting Plastics cannot be reheated and reshaped due to a chemical reaction that occurs when they are first manufactured. • Initially set by heat • Cannot be reshaped once set • Extremely strong and durable • CANT be recycled Think of the word “set” what does it mean? (Put something is a set position)

  6. Thermosetting and thermoforming Click here

  7. Uses of plastics- Thermo setting

  8. Properties of thermosetting • Waterproof • Durable • Hard • Scratch resistant • Resists high temperatures • Electrical insulator

  9. Uses of plastics- Thermoforming

  10. Stock forms (forms plastic is sold in)

  11. Properties of thermo plastics/ forming • Waterproof • Lightweight • Durable • Good strength to weight ratio • Easy to mould • Tough • Easily coloured • Scratch resistant • Corrosion resistant • Chemically resistant • Good flexibility

  12. Properties of plastic and what they mean

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