1
Q
What is the difference between a polymer with cross links and one without?
A
the one with will be stiffer and have a higher melting point.
2
Q
What are cross links?
A
Cross links are covalent bonds between polymer molecules which make the polymer rigid and have a higher melting point.
3
Q
What properties do breathable materials have?
A
They stop rain coming in but let sweat out.
4
Q
The polymer molecules in many plastics are attracted to each other only by which force?
A
weak intermolecular forces.
5
Q
What is the PTFE layer in Gortex laminated in?
A
nylon
Chemistry
flashcards
Decks in class (17)
# Cards
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1.1 Carbon Chemistry-Making crude oil useful13
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1.3 Making crude oil more useful6
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C1:4 Using carbon fuels7
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C1:5 Clean air7
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C1:6 Air pollution12
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C1:7 Alkanes and Alkenes11
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C1:8 Making polymers12
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C1:9 Designer polymers5
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C1:10 Polymer problems4
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C1:11 Cooking4
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C1:12 food additives7
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C1:13 smells8
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C1:Nail varnish and testing3
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C1:Pigments8
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C1:16 Smart paints5
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Fun revision9
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C2 sheet questions8
