8.7 Specialised Polymers 8.7.1 Kevlar LO: I understand how the uses of kevlar are related to its...
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8.7 Specialised Polymers 8.7.1 Kevlar LO: I understand how the uses of kevlar are related to its properties
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Transcript of 8.7 Specialised Polymers 8.7.1 Kevlar LO: I understand how the uses of kevlar are related to its...
8.7 Specialised Polymers
8.7.1 Kevlar
LO: I understand how the uses of kevlar are related to its properties
Kevlar is a .
The linear chains of kevlar are held together by bonding.
Properties:• light weight• strong• durable
Uses:• bullet-proof vests• crash helmets• spacesuits
LO: I understand how the uses of kevlar are related to its properties
polyamide
hydrogen
8.7.2 Polyethenol
LO: I understand how the properties of polyethenol relate to its uses.
Polyethenol is a polymer
The solubility of polyethenol can be varied by changing the number of groups present.
This happens in a process called . .
Uses of polyethenol:• surgical stitches• hospital laundry bags
LO: I understand how the properties of polyethenol relate to its uses.
ester exchange
water soluble
hydroxyl
esterexchang
e
8.7.3 Polyethyne
LO: I understand how polyethyne conducts electricity.
Polyethyne is an electrical .
It’s conductivity is the result of . electrons that can move along the carbon chain.
C
CC
CC
CC
CC
CC
C
H H
H H
H
H
H
H
H
H
H
H
LO: I understand how polyethyne conducts electricity.
conductor
delocalised
