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Tech A level > 1.3 Polymers > Flashcards

1.3 Polymers Flashcards

1
Q

Acrylic (PMMA) properties

A

Stiff
Durable
Good electrical insulator
Water resistant

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2
Q

Acrylic (PMMA) Uses

A

Baths,
ship signs,
car headlights,
lighting

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3
Q

Acrylic (PMMA) Disadvantages

A

Scratches easily
Brittle
Splinters easily

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4
Q

HDPE properties

A

Flexible
Corrosion resistant
Tough
Good electrical insulator

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5
Q

HDPE uses

A

Bottles (bleach, milk),
bowls,
buckets,
crates,
water pipes

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6
Q

HDPE disadvantages

A

Colour tends to fade over time
Can break under stress

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7
Q

LDPE properties

A

Flexible
Corrosion resistant
Good electrical insulator
Tensile strength
Good strength to weight ratio

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8
Q

LDPE uses

A

Cling film, bags, cable insulation, washing up bottles

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9
Q

LDPE disadvantages

A

Colour tends to fade over time

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10
Q

PET properties

A

Corrosion resistant
Tough
Tensile strength
Good alcohol and oil barrier

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11
Q

PET uses

A

Fizzy drinks bottles

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12
Q

PET disadvantages

A

Can discolour
Needs to be treated prior to being used in food products to prevent taste problems

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13
Q

PVC properties

A

Chemical resistant
Water resistant
Tough
Hard
Lightweight
Compressive strength

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14
Q

PVC uses

A

Water pipes, guttering, electrical insulation, floor covering

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15
Q

PVC disadvantages

A

Can brittle over time
Degrades in UV light

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16
Q

PP properties

A

Tough
Corrosion resistant
Light
Hard

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17
Q

PP uses

A

Food pots (i.e. yoghurts), carpets, rope, syringes, kitchenware, chairs, bins, kettles

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18
Q

PP disadvantages

A

UV causes degradation

19
Q

ABS properties

A

Tough
Hard
Chemical resistant

20
Q

ABS uses

A

Safety helmets, mobile phones, lego, camera housings

21
Q

ABS disadvantages

A

UV causes degradation

22
Q

Difference between thermosetting and thermoplastic

A

Thermosetting has cross links, harden permanently and cant be remelted.

Thermoplastics don’t have cross links and can be reshaped with heat many times

23
Q

Thermosetting plastic example

A

Urea Formaldehyde
Epoxy resin
Polyester Resin

24
Q

Elastomer examples

A

PVA
Neoprene
Poly acrylic

25
Q

Urea formaldehyde properties

A

Strong
Electrical insulator
Hard
Heat resistant

26
Q

Urea formaldehyde uses

A

Plug sockets
Manmade board adhesive

27
Q

Urea Formaldehyde disadvantages

A

Brittle
Can emit toxic vapours during manufacturing process

28
Q

Epoxy resin properties

A

Electrical insulator
Hard
Corrosion resistant
Good bond qualities

29
Q

Epoxy resin uses

A

Adhesives and paints

30
Q

Epoxy resin disadvantages

A

Can cause allergic reactions
Suspected health problems

31
Q

Polyester resin properties

A

Corrosion/heat resistant
Electrical insulator
Stiff

32
Q

Polyester resin uses

A

Carbon fibre
Garden furniture
Boat hulls
Pond Liners

33
Q

Polyester resin disadvantages

A

Can crack
Brittle unless mixed with glass/carbon fibre)

34
Q

Elastomer definition

A

Has elastic properties
Technically thermosetting with cross links
Rubber is an elastomer

35
Q

Pva properties

A

Non toxic
Dries clear
Good initial grip/track

36
Q

Pva uses

A

Wood adhesive
Book binding
Primer

37
Q

Pva disadvantages

A

Slow drying needs 24hrs
Needs to be clamped

38
Q

Neoprene properties

A

Flexible
Water resistant
Tough
Resistant to cracking

39
Q

Neoprene uses

A

Wetsuits
Gaskets
Seals
Protective casings

40
Q

Neoprene disadvantages

41
Q

Poly acrylic properties

A

Lightweight
Transparent
Shatter resistant

42
Q

Poly acrylic uses

A

Display units
car headlights
windows

43
Q

Poly acrylic disadvantages

A

Poor chemical resistance

Tech A level (10 decks)

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