48 - Polymers Flashcards
1
Q
What is a polymer?
A
A long chain of monomers
2
Q
What determines the properties of a plastic?
A
The bonds between the polymer chains
3
Q
What are thermosoftening polymers?
A
Polymers with weak forces between chains
Easy to melt and remould
4
Q
What are thermosetting polymers?
A
Polymers with crosslinks between chains
Strong and rigid
Don’t melt or remould
5
Q
How do you make low density polyethene?
A
In 200 degrees under high pressure
6
Q
How do you make high density polyethene?
A
Low temperature and pressure with a catalyst
