Polymers.

Question 1

Name the three main groups of polymers?

Answer 1

Thermoplastics, thermosetting plastics and biodegradable plastics.

Question 2

Define thermoplastics:

Answer 2

It can be repeatedly reheated and reshaped.

Question 3

Define thermosetting plastics:

Answer 3

It cannot be reheated or reshaped once set.

Due to the strong intermolecular bonds.

Question 4

ABS characteristics and uses.

Answer 4

characteristics: Impact and scratch resistant as well as lightweight.
uses: toys, safety helmets and computer cases.

Question 5

LDPE characteristics and uses.

Answer 5

characteristics: Tough, good chemical resistance, weatherproof and low level of rigidity.
uses: detergent bottles, packaging and bin liners.

Question 6

PP characteristics and uses.

Answer 6

characteristics: good chemical resistance, tough and good fatigue resistance.
uses: folders, food containers and folio cases.

Question 7

HIPS characteristics and uses.

Answer 7

characteristics: hard, rigid and tough.
uses: yoghurt pots, toilet seats and single use drink cups.

Question 8

Nylon characteristics and uses.

Answer 8

characteristics: tough, corrosion resistant, low coefficient of friction and dries quickly.
uses: bearings and gears.

Question 9

PVC characteristics and uses.

Answer 9

characteristics: tough, flexible, good weathering resistance and good chemical resistance.
uses: hose pipes, cable insulation and inflatable products.

Question 10

UF characteristics and uses. SET

Answer 10

characteristics: very hard, heat resistant, good insulator but brittle.
uses: electrical plug socket.

Question 11

MF characteristics and uses. SET

Answer 11

characteristics: hard, opaque, heat resistant, food safe and chemical resistant.
uses: plates and laminates.