design technology > Polymers > Flashcards

Polymers Flashcards

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1
Q

polymer stock forms

A

sheet
granules
powder
film
rod
foam

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2
Q

what is a thermoplastic

A

polymer that can be reheated and reshaped; can be recycled

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3
Q

what is a thermoset polymer

A

when heated, polymer goes through a chemical change that cannot be undone. they cannot be recycled

they are designed for long term use hence the rigid bonds they form

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4
Q

what is an elastomer

A

at room temp can be deformed under pressure and then without the pressure can go back to its original shape

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5
Q

polymers are made from

A
  • crude oil and take many years to degrade
  • sustainable/ natural resources biopolymers
  • recycled polymers
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6
Q

how many thermoset plastics are there

A

4

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7
Q

what type of plastic is Urea formaldehyde (UF)

A

thermoset

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8
Q

Urea Formaldehyde (UF) characteristics

A
  • hard
  • brittle
  • good insulator
  • heat resistant
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9
Q

UF uses

A
  • electrical casing eg remotes, sockets
  • adhesives
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10
Q

Melamine Formaldehyde (MF) characteristics

A
  • hard
  • tough
  • heat resistant
  • food safe
  • chemical resistant
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11
Q

UF melting point

A

80

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12
Q

MF melting point

A

130

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13
Q

what type of plastic is Melamine Formaldehyde (MF)

A

thermoset

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14
Q

MF uses

A

food plates
picnic ware
buttons

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15
Q

what type of plastic is Polyester resin

A

thermoset

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16
Q

Polyester resin characterstics

A
  • heat resistant
  • chemical resistant
  • brittle
  • dries hard and tough
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17
Q

polyester resin uses

A
  • reinforce and strengthen other surfaces like car parts
  • used in lay up processes
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18
Q

polyester resin melting point

A

95

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19
Q

what type of plastic is epoxy resin

A

thermoset

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20
Q

epoxy resin characteristics

A
  • hard
  • heat resistant
  • rigid
  • chemical resistant
  • tough
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21
Q

epoxy resin uses

A
  • adhesives
  • aerospace applications
  • used in lay up process
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22
Q

epoxy resin melting point

A

80-200

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23
Q

natural rubber polymer type

A

elastomer

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24
Q

natural rubber characteristics

A
  • high tensile strength
  • low elongation
  • hard
  • tough
  • electrical insulator
  • good thermal resistance against friction
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25
natural rubber uses
- car tyres - tubes - hoses - balloons - footwear
26
Butadiene rubber (BR) polymer type
elastomer
27
butadiene rubber (BR) characteristics
- tough - good wear resistance against friction - good thermal resistance against friction - electrical insulator
28
butadiene rubber (BR) uses
tyres shoe soles conveyor belts water hoses toys
29
neoprene polymer type
- elastomer
30
neoprene characteristics
thermal resistant oil/ chemical resistant weather resistant tough electric insulator good abrasion resistance
31
neoprene uses
wetsuits laptop cases hose covers industrial wire insulation
32
silicone polymer type
thermoset
33
silicone characteristics
good flexibility at low temperatures poor abrasion resistance good thermal resistance good weather resistance good lubricating qualities electrical insulator
34
silicone uses
flexible ice tray bakeware cooking utensiles lubricants
35
what type of polymer is LDPE
thermoplastic
36
LDPE characteristics
- lightweight - weather resistant - tough - ductile - tough - range of colours
37
LDPE Resin code number
4
38
LDPE melting point
65
39
LDPE uses
bin liners carrier bags cling film
40
what type of polymer is HDPE
thermoplastic
41
HDPE characteristics
- chemical resistance - tough - weather resistance
42
HDPE resin code
2
43
HDPE uses
chemical drums jerry cans buckets detergent bottles
44
HDPE melting point
65
45
what type of polymer is polypropylene
thermoplastic
46
PP characteristics
- good fatigue (hinge resistance) - tough - weather proof - good chemical resistance
47
PP Resin code
5
48
PP uses
- plastic hinges bottle lids - medical syringes - food storage
49
PP melting point
100
50
what type of polymer is HIPS
thermoplastic
51
HIPS characteristics
- hard - tough - rigid
52
HIPS uses
- single use plastic cup - yoghurt pots - toilet seats
53
HIPS melting point
70
54
ABS polymer type
thermoplastic
55
ABS Characteristics
- hard - tough - electrical insulator
56
ABS uses
- hard hats - electrical appliance casing eg fridge
57
ABS melting point
80
58
PMMA polymer type
thermoplastic
59
PMMA Characteristics
- hard - tough - chemical resistant
60
PMMA is more commonly known as
acrylic
61
PMMA uses
acrylic car light casing baths
62
PMMA melting point
95
63
Nylon polymer type
thermoplastic
64
nylon characteristics
corrosion resistant tough hard low friction
65
nylon uses
bags clothing plastic screws
66
nylon melting point
150
67
PVC polymer type
thermoplastic
68
PVC characteristics
- tough - flexible - good weathering resistance - good chemical resistance
69
PVC uses
inflatables hoses imitation leather medical grade tubing
70
PVC resin code number
3
71
PVC melting point
95
72
uPVC polymer type
thermoplastic
73
uPVC characteristics
tough hard rigid good weathering resistance good chemical resistance
74
uPVC uses
bank cards pipes window frame
75
uPVC melting point
95
76
what is the resin identification code used for
thermoplastics, helps recycle plastics more efficiently
77
name the 7 resin id codes
1 PETE 2 HDPE 3 PVC 4 LDPE 5 PP 6 PS 7 OTHER
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