Unit 2 Materials and Components - Polymers - Thermoplastics Flashcards

1
Q

What are the properties of acrylic?

A
  • stiff
  • hard
  • durable
  • easily scratched
  • good electrical insulator
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2
Q

What are the disadvantages of acrylic?

A
  • brittle
  • can break
  • scratches easily
  • splinters easily
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3
Q

What are the applications of acrylic?

A
  • lighting
  • CD cases
  • car lighting
  • baths
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4
Q

What are the different types of polyethylene?

A
  • HDPE
  • LDPE
  • PET
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5
Q

What are the properties of HDPE (high density polyethylene)?

A
  • good electrical insulator
  • chemical resistant
  • impact resistant
  • flexible
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6
Q

What are the disadvantages of HDPE (high density polyethylene)?

A
  • colour tends to fade over time

- can break under stress

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7
Q

What are the applications of HDPE (high density polyethylene)?

A
  • water tanks
  • water pipes
  • buckets
  • bowls
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8
Q

What are the properties of LDPE (low density polyethylene)?

A
  • good electrical insulator
  • chemical resistant
  • flexible
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9
Q

What are the disadvantages of LDPE (low density polyethylene)?

A
  • colour tends to fade over time

- can break under stress

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10
Q

What are the applications of LDPE (low density polyethylene)?

A
  • washing up liquid bottles
  • dustbin sacks/bags
  • cable insulation
  • packaging film
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11
Q

What are the properties of PET (polyethylene terephthalate)?

A
  • good alcohol and oil barrier
  • chemical resistant
  • high impact resistance
  • high tensile strength
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12
Q

What are the disadvantages of PET (polyethylene terephthalate)?

A
  • can discolour

- when use in containers for food stuffs, it needs to be treated to prevent taste problems

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13
Q

What are the applications of PET (polyethylene terephthalate)?

A
  • fizzy drink bottles
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14
Q

What are the properties of PVC (polyvinyl chloride)?

A
  • good chemical resistance
  • weather resistant
  • stiff, tough, hard, lightweight
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15
Q

What are the disadvantages of PVC (polyvinyl chloride)?

A
  • can become brittle over time

- ultraviolet light causes brittleness

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16
Q

What are the applications of PVC (polyvinyl chloride)?

A
  • electrical wiring insulation
  • pipes for guttering
    floor covering
17
Q

What are the properties of PP (polypropylene)?

A
  • light, hard, impact resistant

- chemical resistant

18
Q

What are the disadvantages of PP (polypropylene)?

A
  • ultraviolet light causes degradation

- oxidation can be a problem during manufacturing process

19
Q

What are the applications of PP (polypropylene)?

A
  • medical syringes
  • carpets
  • kitchenware
20
Q

What are the properties of PS (polystyrene)?

A

compressed:
- light, hard, stiff, brittle, low impact strength

expanded:
- buoyant, lightweight, good insulator

21
Q

What are the disadvantages of PS (polystyrene)?

A

compressed:
- weak, ignites easily

expanded:
- crumbles and breaks, easily ignites

22
Q

What are the applications of PS (polystyrene)?

A

compressed:

  • CD cases
  • refrigerator linings
  • water tanks

expanded:

  • packaging
  • insulation
  • displays
23
Q

What are the properties of ABS (acrylonitrile butadiene styrene)?

A
  • chemical resistant
  • hard
  • tough
24
Q

What are the disadvantages of ABS (acrylonitrile butadiene styrene)?

A
  • UV light causes degradation
25
Q

What are the applications of ABS (acrylonitrile butadiene styrene)?

A
  • mobile phones

- safety helmets