Polymers (AQA GCSE Design and Technology): Flashcards
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13 cards from this deck
What are polymers?
What are polymers?
Large molecules made from oil, coal, gas, or plants
Two main categories of plastics
Two main categories of plastics
Thermoforming and thermosetting
Thermoforming polymers key trait
Thermoforming polymers key trait
Can be heated & reshaped multiple times
Thermoforming polymer structure
Thermoforming polymer structure
Long chains that slide past each other when heated
HIPS properties & use
HIPS properties & use
Tough, impact-resistant; food containers, toys
PET properties & use
PET properties & use
Tough, strong, clear, non-porous; drinks bottles
PVC properties & use
PVC properties & use
Tough, strong, flexible; drainpipes, raincoats
PP (Polypropylene) use
PP (Polypropylene) use
Car bumpers - tough, durable, impact-resistant
Thermosetting polymers key trait
Thermosetting polymers key trait
Cannot be reformed with heat once set
Thermosetting polymer structure
Thermosetting polymer structure
Cross-links between chains create rigid network
MF properties & use
MF properties & use
Fire & heat resistant; kitchen work surfaces
Epoxy resin composition
Epoxy resin composition
Two-part: resin & hardener
Recyclability: thermoforming vs thermosetting
Recyclability: thermoforming vs thermosetting
Thermoforming: yes; thermosetting: no