1
Q
What are the two families of plastics called?
A
Thermoplastics
Thermosetting plastics
2
Q
What are the properties of Thermosetting plastics?
A
They melt the first time they are heated but once cooled it sets and remains hard even if reheated.
3
Q
What are the properties of
Thermoplastics?
A
Can be softened by heating even when they have been heated before. They will always set again when cooled.
4
Q
Name two thermosetting plastics
A
Polyester resin
Epoxy resin
5
Q
Name two thermoplastics
A
Acrylic
Polystyrene
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