UNIT 1: Technology - Plastics

Question 1

What are thermoplastics

Answer 1

Thermoplastics are made up of lines of molecules with a few cross linkages this allows them to soften up when heated and to be bent into a variety of shapes and forms. They become stiff and solid again when cold. This process can be repeated many times

Question 2

What are thermosetting plastics

Answer 2

Are made up of lines of molecules which are heavily cross linked. It creates a very rigid molecular structure. this may be heated first time and shaped but become permanently stiff and solid and cannot be reshaped again

Question 3

What is fabrication

Answer 3

Cutting, filing sawing, drilling & shaping things

Question 4

Rigid PVC
(poly vinyl chloride)

Properties, Uses,

Answer 4

Stiff & Hard

Pipes, Shoe Soles.

Question 5

Polystyrene
(high impact polystyrene)

Properties, Uses,

Answer 5

Thermoplastic
Good for vacuum forming

Question 6

ABS

Properties, Uses,

Answer 6

Stiff strong and tough, scratches easily
Car interior, lego

Question 7

Nylon
(polyamide)

Properties, Uses,

Answer 7

Self-lubricating
Wear & Friction resistant

Gear wheels, bearing

Question 8

Low density polythene
Properties, Uses,