Properties of Polymers

1
Properties of Polymers
LO Describe the difference between thermosetting
and thermosoftening polymers. (D) Explain how
changing the monomer can affect the properties of
a polymer (C) Investigate the effect of
cross-linkers on a polymer (B) Plan an experiment
to find out how a polymer would be affected by
the addition of a cross-linking chemical
(A/A) Starter Using the text book find out what
is meant by.. Thermo-setting Thermo-softening
2
What are the chemicals that polymers are made
from called ?
MONOMERS
3
(No Transcript)
4
Testing for cross-linking

• Design an experiment to test the effect of adding
  a cross-linker to a liquid polymer.
• You need to include
• What equipment will you use ?
• What is your independent variable ?
• What are your control variables ?
• What will your interval and range be ?
• How are you going to measure the effect of
  cross-linking ?

5
Things that change polymers
Different monomers will give different
polymers. Different reaction conditions will
give different polymers.
6
Low density Made with high pressure and a bit
of oxygen. High density Made with slight
pressure, 50oC and a catalyst.
7
(No Transcript)
8
(No Transcript)
9
(No Transcript)
10
(No Transcript)