Discussion

Match the following polymers to the most appropriate product

Polymer	Product
P. Expanded polystyrene	1. Motor bearings
Q. Polyether ether ketone	2. TV cabinet
R. Polycarbonate	3. Sound proof walls
S. Poly(butylene terephthalate)	4. Safety glass

Answer: D

The match is P-3; Q-1; R-4; S-2.

Expanded polystyrene is a light closed-cell foam used for sound and heat insulation in walls.
PEEK keeps its strength and wear resistance at high temperature, which suits it to bearings.
Polycarbonate is transparent and very tough, the material of safety glazing.
PBT, a moulding polyester with good electrical properties, is used for housings such as TV cabinets.

Each other option misplaces polycarbonate, PEEK or expanded polystyrene, for example putting the foam in a TV cabinet or using PBT for safety glass.

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