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DT GCSE > Polymers - GCSE DT > Flashcards

Polymers - GCSE DT Flashcards

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1
Q

Where do plastics come from?

A

Oils and some plants

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2
Q

How long does it take plastic to break down?

A

1000’s of years and oil is a finite resource

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3
Q

What are the properties of thermoforming plastics?

A

Long chain molecules, easy to form by heating, can be reformed (recyclable)

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4
Q

What are properties of thermosetting plastics?

A

Rigid cross links form, heat resistant, chemical change (hard and rigid), not recyclable

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5
Q

What does the mobius loop mean?

A

The number in the middles is its’ resin code so it can be recycled

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6
Q

Thermoforming - what are PET properties and uses?

A

Light, strong, tough
See through drink bottle

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7
Q

Thermoforming - what are HDPE properties and uses?

A

Stiff, strong and lightweight
Washing up bowl, gas + water pipe

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8
Q

Thermoforming - what are PVC properties and uses?

A

Brittle, inexpensive and durable
Medicine packs and window frames

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9
Q

Thermoforming - what are LDPE properties and uses?

A

Semi-rigid, translucent and chemically resistant
Plastic dispensing bottles and plastic bags

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10
Q

Thermoforming - what are PP properties and uses?

A

Tough, flexible and variety of colours
Plastic chairs and plastic files

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11
Q

Thermoforming - what are acrylic properties and uses?

A

Hard, stiff and resistant to weather
Visorsand safety guards on machines

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11
Q

Thermoforming - what are ABS properties and uses?

A

Tough, lightweight and high impact resistant
Safety helmets and phone cases

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12
Q

Thermoplastic elastomers - what are silicones properties and uses:

A

Insulators, repels water and adhesives
Sealants and cooking utensils

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13
Q

Thermosetting - what are epoxy resins properties and uses?

A

Rigid, corrosion resistantand electrical insulator
Circuit boards and wind turbine blades

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14
Q

Thermosetting - what are polyester resin properties and uses?

A

Hard, waterproof and electrical insulators
Glass fibres add to make stronger
canoes

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15
Q

Thermosetting - what are urea formaldehyde properties and uses?

A

Hard, brittle and electrical insulator
Plug sockets and cupboard handles

16
Q

Thermosetting - what are melamine formaldehyde properties and uses?

A

Scratch resistant, strong
Plastic plates, bowls and mugs

17
Q

Thermosetting - what are phenol formaldehyde properties and uses?

A

Hard, heat resistant and easily moulded
Bottle caps and snooker balls

18
Q

What are biodegradable plastics?

A

They are designed to break down in certain conditions

19
Q

Where do biodegradable plastics come from?

A

Renewable sources like wheat, potatoes and corn

20
Q

What are the uses of biodegradable plastics?

A

Shopping bags, food trays and medical products

DT GCSE (11 decks)

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