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GCSE Design and Technology > Polymers > Flashcards

Polymers Flashcards

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1
Q

Types of polymers

A

Thermoforming polymers
Thermosetting polymers

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2
Q

What are the majority of polymers manufactured from

A

The majority of polymers are manufactured from the non-renewable resource crude oil

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3
Q

Define thermoforming polymer

A

Polymers that can be softened by heating, shaped and set over and over again

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4
Q

Define thermosetting polymers

A

Polymers that can only be shaped and formed by heat once

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5
Q

Types of thermoforming polymers

A

Acrylic
High-impact polystyrene (HIPS)
High-impact polythene (HDPE)
Polypropylene (PP)
Polyvinyl chloride (PVC)
Polyethylene terephthate (PET)

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6
Q

Properties of acrylic

A

Hard
Excellent optical quality
Good resistance to weathering
Scratches easily

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7
Q

Uses of acrylic

A

Car light units
Bath tybs
Shop signage and displays

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8
Q

Used of high-impact polyestyrene

A

Tough hard rigid
Good impact resistance
Light weight

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9
Q

Uses of high-impact polyestyrene

A

Children’s toys
Yoghurt pots
Refrigerator liners

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10
Q

Properties of HDPE

A

hard and stiff
Excellent chemical resistance

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11
Q

uses of HDPE

A

Washing up bowls, buckets, milk crates, bottles and pipes

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12
Q

Properties of Polypropylene

A

Tough
Good heat and chemical resistance
Low cost
Can be rigid or flexible

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13
Q

uses of polypropylene

A

Toys
DVDs
Blu-ray cases
Bottle caps
Medical equipment
Packaging film

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14
Q

Properties of PVC

A

Hard and tough
Good chemical and weather resistance
Low cost
Can be rigid or flexible

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15
Q

Uses of PVC

A

Pipes
Guttering
Window frames

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16
Q

Properties of PET

A

Tough and durable
Lightweight
Food safe
Impermeable to water
Low cost

17
Q

Uses of PET

A

Drinks bottle
Food packaging

18
Q

Types of thermostetting polymers

A

Epoxy resin
Melamine formaldehyde (MF)
Phenol formaldehyde (PF)
Polyester resin
Urea formaldehyde (UF)

19
Q

Properties of epoxy resin

A

Electrical insulator
Good chemical and wear resistance

20
Q

Uses of epoxy resin

A

Adhesives suvhas araldite
PCB component encapsulation

21
Q

Properties of Melamine Formaldehyde

A

Stiff hard strong
Excellent resistance to heat, scratching and staining

22
Q

Uses of melamine Formaldehyde

A

Kitchen work-surface laminates
Tableware

23
Q

Properties of phenol formaldehyde

A

Hard
Heat and chemical resistant
Good electrical insulator
Limited colours available

24
Q

Uses of phenol formaldehyde

A

Electrical fittings
Saucepan handles
Bowling bowls

25
Q

Properties of polyester resin

A

Brittle but becomes tough when laminated with fibre glass

26
Q

Properties of polyester resin

A

Brittle but becomes tough when laminated with fibre glass
Hard and resistant to UV

27
Q

Uses of polyester resin

A

GRP boats
Car body panels

28
Q

Properties of Urea Formaldehyde (UF)

A

Stiff and hard
Heat resistant
Good electrical insulator

29
Q

Uses of Urea Formaldehyde

A

White electrical fittings
Toilet seats
Adhesive used in MDF

30
Q

What are the purpose of additives

A

The purpose of additives to to further enhance the properties of polymers

31
Q

State the uses of additives

A

Plasticisers can be added to make the polymer soft and flexible - often found in PVC

Pigments can be added to change the colour of the polymer
Stabilisers can be added to help the polymer withstand UV light damage which is especially useful in products that may be used outdoors

Filters can be used to increase the bulk of the polymer, this can help improve its impact resistance

GCSE Design and Technology (16 decks)

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