Plastics - general Flashcards
What is the structure of thermoforming plastics?
Long chains of plastics
What is the structure of thermosetting plastics?
Long chains cross bonded
What are plastics made from?
Fossil fuel, i.e. crude oils
Hydrocarbons
Sugars
Carbohydrates
What are the characteristics of a thermoforming plastic?
Tough
Low melting point
Weak
Soft
Recyclable
What are the characteristics of thermosetting plastics?
Strong
Durable
Hard
High melting point
More inert (unreactive)
Rigid
Non-corrosive
Brittle
Not recyclable
Name three thermoforming plastics.
Acrylic
PVC
Polyester
PET
Nylon
PP
ABS
Name three thermosetting plastics.
Epoxy resin
Melamine Formaldehyde
Urea Formaldehyde
Elastane
Why are thermosetting plastics not recyclable?
There are too many bonds to break, so it will not break down. It will burn instead. These are not sustainable plasics