Thermo Plastics (plastics)

Question 1

Polyamide (nylon)

Answer 1

Properties:
- Creamy colour
- Tough
- Fairly hard
- Resistant to wear
- Self-lubricating (creates a film that provides lubrication and reduces friction)
- Good resistance to chemicals and high temperatures
Used:
- Bearings
- Hinges for small cupboards
- Clothing
- Gear wheels
- Casings for power tools
- Curtain rail fittings
- Rope
- Combs

Question 2

Polymethyl methacrylate (acrylic)

Answer 2

Properties:

• Stiff
• Hard but scratches easily
• Brittle in small sections
• Good electrical insulator
• Machines and polishes well
• Clear
• Durable outdoors
• Range of colours
• Impact resistance (glass substitute)
  Uses:
• Signs
• Covers of storage boxes
• Aircraft canopies and windows
• Covers for car lights
• Wash basins and baths
• Seats

Question 3

Polypropylene

Answer 3

Properties:
- Lightweight
- Hard but scratches easily
- Tough
- Good resistance to chemicals
- Resists weakening as a result of prolonged/ repeated stress (work fatigue)
Uses:
- Medical equipment
- Laboratory equipment
- Containers with built-in hinges
- ‘Plastic’ seats
- String
- Rope
- Kitchen equipment

Question 4

Polystyrene

Answer 4

Properties:
- Light
- Hard
- Stiff
- Transparent
- Brittle
- Good water resistance
- Range of colours
Uses:
- Toys
- Especially model kits
- Packaging
- ‘Plastic’ boxes and containers

Question 5

Low density plyethylene (LDPE)

Answer 5

Properties:
- Tough
- Good resistance to chemicals
- Flexible
- Fairly soft
-Good electrical insulator
- Range of colours
Uses:
- Packaging
- Especially bottles
- Toys
- Packaging film and bags

Question 6

High density polyethylene (HDPE)

Answer 6

Properties:
- Hard
- Stiff
- Able to be sterilised
- Range of colours
Uses:
- Plastic bottles 
- Tubing
- Household equipment