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What is a polymer?
Plastics are examples of polymers. Polymers are made from smaller units called monomers. Many monomers are small unsaturated molecules produced by the cracking of crude oil fractions.
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What are five properties of plastics?
Waterproof, Non-biodegradable, Flexible, Lightweight, Transparent, Tough
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What are the properties of nylon
Lightweight, waterproof (but not breathable), tough, able to block ultraviolet (UV) light (harmful sunlight)
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What are the properties of Gore-Tex?
It has all the advantages of nylon, but it is also treated with a material that allows perspiration (water vapour) to escape whilst preventing rain from getting in. It is breathable.
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How does Gore-Tex work?
Gore-Tex membrane of PTFE between two layers of nylon. PTFE has tiny holes that let let water vapour pass, but not liquid water. PTFE laminate is fragile so it can't be used on it's own.
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Describe the structure of plastics?
Polymers (plastics) like P.V.C are made of long chain molecules, whose atoms are joined by strong covalent bonds. Depending on how the molecules are arranged, plastics have different properties.Low melting point= stretchy, high=rigid.
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Other cards in this set

Card 2

Front

What are five properties of plastics?

Back

Waterproof, Non-biodegradable, Flexible, Lightweight, Transparent, Tough

Card 3

Front

What are the properties of nylon

Back

Preview of the front of card 3

Card 4

Front

What are the properties of Gore-Tex?

Back

Preview of the front of card 4

Card 5

Front

How does Gore-Tex work?

Back

Preview of the front of card 5
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