1
Q
What are the two groups of plastic called?
A
Thermoplastics and thermosetting plastics.
2
Q
Advantage of plastic
A
Durable •Won’t rust or corrode •Good insulators •Resistant to chemicals •Can be formed into complex shapes
3
Q
Disadvantages of plastic
A
Expensive •Not friendly to the environment •Don’t break down or degrade easily •Energy needed to produce them •Can be a fire hazard
4
Q
Types of thermoplastics
A
PVC (polyvinyl chloride) −Polystyrene −Polycarbonate −Nylon −Acrylic
5
Q
Types of thermosetting plastics
A
−Polyester
−Melamine
−Epoxy resins
6
Q
What is thermoplastics?
A
Can be softened and reshaped by heating again and again
7
Q
What is thermosetting plastics
A
It can be heated and set, once only
•Cannot be re-softened
•Used where an item needs to withstand heat
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