F334 The Materials Revolution

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What's the difference between ammonia and amines?
Ammonia has three hydrogen atoms bonded to a central nitrogen but amines have one of more alkyl groups substituted for hydrogen
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The lone pair in ammonia is responsible for what three main properties?
Ammonia can act as bases, nucleophiles and ligands
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Difference between primary, secondary and tertiary amines?
P: N bonded to one alkyl group. S: N bonded to two alkyl groups. T: N bonded to three alkyl groups.
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Name CH3CH2NH2
ethylamine or aminoethane
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Amines dissolve in water to form what?
weakly alkaline solutions
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When hydrogen atoms in amines are replaced by alkyl groups, this is called what?
Alkylation
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When amines react with acyl chlorides, what is this called?
Acylation
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What is an amide?
CONH
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Describe condensation polymerisation
Two different monomers join together and a small molecule is often eliminated
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Describe a polymer when the temperature is below its glass transition temperatyre (Tg)
It's brittle and glass-like
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What kind of polymer is nylon (polyamide)?
A condensation polymer formed from diamines and dicarboxylic acids
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What types of intermolecular bonds hold nylon chains together?
Hydrogen bonds
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What kind of polymer is a polyester?
A condensation polymer made from diols and dicarboxylic acids
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What types of intermolecular bonds hold polyester chains together?
Permanent dipole - permanent dipole
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In what two ways can you lower the Tg of a polymer?
Copolymerisation and adding plasticisers
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How can you increase the strength of a polymer?
Cold drawing
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Name 5 alternative options to putting plastics (which take a long time to decompose) in a landfill/burying them
Recycling, remoulding, cracking, design degradable plastics and burning
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What is a 'life cycle assessment'?
Measures emissions during extraction of raw materials, manufacture, distribution and its eventual disposal
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Other cards in this set

Card 2

Front

The lone pair in ammonia is responsible for what three main properties?

Back

Ammonia can act as bases, nucleophiles and ligands

Card 3

Front

Difference between primary, secondary and tertiary amines?

Back

Preview of the front of card 3

Card 4

Front

Name CH3CH2NH2

Back

Preview of the front of card 4

Card 5

Front

Amines dissolve in water to form what?

Back

Preview of the front of card 5
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