Paper 1 - Synthetic Polymers Flashcards
1
Q
How is the repeat unit of polyethene drawn?
A
H H
\ /
C–C
/ \
H H
2
Q
How is the repeat unit of polypropene drawn?
A
H H H
\ | /
C-C-C
/ | \
H H H
3
Q
How is the repeat unit of polychloroethene drawn?
A
H Cl
\ /
C–C
/ \
H H
4
Q
How is the repeat unit of polytetrafluoroethylene drawn?
A
F F
\ /
C–C
/ \
F F
5
Q
Why do polymers not biodegrade?
A
They are inert and do not react
6
Q
What is addition polymerisation and what does it require?
A
- A process where alkanes are used to make polymers
- Many small chain monomers join together to form very large polymers
- Requires a catalyst and high temperatures
7
Q
How is an addition polymer formed?
A
By joining up many small molecules called monomers
8
Q
What are the problems with recycling polymers?
A
- Different polymers must be separated
- Difficult and expensive to carry out
9
Q
How can polymers be disposed of?
A
- Incineration
- Recycling
10
Q
What are the problems with incineration of polymers?
A
- Produces CO2 and other toxic gases
- Requires and uses a lot of energy
