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DT GCSE > Polymers > Flashcards

Polymers Flashcards

1
Q

what are plastics made of

A

polymers

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2
Q

What are thermoforming plastics

A

Plastics that are recyclable and bendy, can be heated and reformed because of the way the molecules are joined together

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3
Q

Examples of thermoforming plastics

A
  • Acrylic (PMMA)
  • High density polyethylene (HDPE)
  • Polyethylene terephthalate ( PET)
  • High impact polystyrene (HIPS)
  • Polyvinyl chloride (PVC)
  • Polypropylene (PP)
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4
Q

Properties and uses of acrylic (PMMA)

A
  • Hard
  • Stiff
  • shiny
  • resists weather well
  • used to make baths, signs etc
  • quite brittle
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5
Q

Properties and uses of High density polyethylene (HDPE)

A
  • Stiff
  • Strong
  • Lightweight
  • Used for baskets, folding chairs, water pipes
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6
Q

Properties and uses of Polyethylene terephthalate (PET)

A
  • polyester which is light, strong, tough
  • used in transparent water bottles
  • used in clothes fibres
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7
Q

Properties and uses of High impact polystyrene (HIPS)

A
  • Rigid
  • Fairly cheap
  • Used for smoke detector cases, vacuum forming
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8
Q

Properties and uses of polyvinyl chloride (PVC)

A
  • Quite brittle
  • Cheap
  • Durable
  • Used for window frames
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9
Q

Properties and uses of polypropylene

A
  • Quite tough and flexible

- Used for plastic chairs, the flexibility makes it comfortable

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10
Q

What are thermosetting plastics

A

Plastics which set with heat and permanently stay ridgid. They are non- recyclable and cannot be reshaped

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11
Q

Examples of thermosetting plastics

A
  • Epoxy Resin (ER)
  • Urea- Formaldehyde (UF)
  • Melamine- Formaldehyde (MF)
  • Phenol- Formaldehyde (PF)
  • Polyester Resin (PR)
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12
Q

Properties and uses of Epoxy Resin (ER)

A
  • Rigid
  • Durable
  • Corrosion resistant
  • Good electrical insulator
  • Used for circuit boards and wind turbine rotor blades
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13
Q

Properties and uses of Urea- Formaldehyde (UF)

A
  • Hard
  • Brittle
  • Good electrical insulator
  • Used for plug sockets and cupboard handles
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14
Q

Properties and uses of Melamine- Formaldehyde (MF)

A
  • Strong
  • Scratch resistant
  • Used to laminate chipboard and for plates and bowls
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15
Q

Properties and uses of Phenol-Formaldehyde (PF)

A

Hard
Heat resistant
Easily moulded into bottle caps, snooker balls

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16
Q

Properties and uses of Polyester Resin

A
  • Hard
  • Stiff
  • Cheap
  • Good electrical insulator
  • Added to glass fibres to form glass- reinforced plastic, e.g- for kayaks
  • waterproof, so used in shower stalls and garden furniture

DT GCSE (26 decks)

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