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Module 6
Chapter 27
PMT polyesters and polyamides
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Cards (30)
What is condensation in terms of polymers?
Small molecule
eliminated to form a larger molecule
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What small molecule is usually eliminated during condensation?
H2O
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How many monomers are condensation polymers usually formed from?
Two
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What properties do monomers forming condensation polymers have?
Each has two
functional groups
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What is the linkage in a polyester?
Esther linkage
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What molecule is eliminated in the formation of a polyester?
H2O
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What are the two monomers that form a polyester?
Diol
and
dicarboxylic acid
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What is a generic repeating unit for a polyester?
Structure with
ester linkages
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Which monomers is Terylene made from?
Diol
and
dicarboxylic acid
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What is Terylene used for?
As a fibre for making clothes
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What is the linkage in a polyamide?
Amide linkage
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Which molecule is eliminated when a polyamide is formed?
H2O
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What are the two monomers used to form a polyamide?
Diamine
and
dicarboxylic acid
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Which monomers is Nylon-6,6 made from?
Hexamethylenediamine
and
adipic acid
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What is the repeating unit of Nylon-6,6?
Structure with
amide
linkages
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If you are making Nylon in the lab, what monomers would you use?
Hexane-1,6-diacyl chloride
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What molecule is eliminated when making Nylon?
HCl
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What is Kevlar used for?
In
body armour
and
oven gloves
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Which monomers make up Kevlar?
Diamine
and dicarboxylic acid
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What is the repeating unit of Kevlar?
Structure with
amide
linkages
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Why are poly(alkenes) not biodegradable?
Non-polar
C-H
and
C-C
bonds
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Why is it bad to burn poly(alkenes)?
Releases
toxic
chemicals and soot
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Where do most poly(alkenes) end up?
Landfill sites
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Why can condensation polymers be broken down?
They have
polar bonds
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How are condensation polymers broken down?
Hydrolysis
(opposite of condensation)
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What is the difference between addition and condensation polymerisation?
Condensation eliminates a
small molecule
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Explain hydrogen bonding between polyamides.
C=O
and
N-H
are polar bonds
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Why do polyesters not show hydrogen bonding?
All
O-H
bonds are removed during
polymerisation
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Write the products of acid and base hydrolysis of a polyester.
Diol
Dicarboxylic
acid
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Write the products of acid and base hydrolysis of a polyamide.
Diamine
Dicarboxylic acid
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