Polymers - GCSE DT Flashcards
Where do plastics come from?
Oils and some plants
How long does it take plastic to break down?
1000’s of years and oil is a finite resource
What are the properties of thermoforming plastics?
Long chain molecules, easy to form by heating, can be reformed (recyclable)
What are properties of thermosetting plastics?
Rigid cross links form, heat resistant, chemical change (hard and rigid), not recyclable
What does the mobius loop mean?
The number in the middles is its’ resin code so it can be recycled
Thermoforming - what are PET properties and uses?
Light, strong, tough
See through drink bottle
Thermoforming - what are HDPE properties and uses?
Stiff, strong and lightweight
Washing up bowl, gas + water pipe
Thermoforming - what are PVC properties and uses?
Brittle, inexpensive and durable
Medicine packs and window frames
Thermoforming - what are LDPE properties and uses?
Semi-rigid, translucent and chemically resistant
Plastic dispensing bottles and plastic bags
Thermoforming - what are PP properties and uses?
Tough, flexible and variety of colours
Plastic chairs and plastic files
Thermoforming - what are acrylic properties and uses?
Hard, stiff and resistant to weather
Visorsand safety guards on machines
Thermoforming - what are ABS properties and uses?
Tough, lightweight and high impact resistant
Safety helmets and phone cases
Thermoplastic elastomers - what are silicones properties and uses:
Insulators, repels water and adhesives
Sealants and cooking utensils
Thermosetting - what are epoxy resins properties and uses?
Rigid, corrosion resistantand electrical insulator
Circuit boards and wind turbine blades
Thermosetting - what are polyester resin properties and uses?
Hard, waterproof and electrical insulators
Glass fibres add to make stronger
canoes