|Polymer||A very large molecule formed from many monomer molecules|
|Monomer||Small molecules that join together to form one large polymer molecule|
|Addition polymerisation||A reaction where the C=C double bonds of a monomer are split up to form a larger molecule|
|Condensation polymerisation||A reaction where the polymer forms when a molecule of water is lost in order to join the two monomers.|
|Macromolecule||A very large molecule made up of repeating units of atoms or molecules|
Alkenes can take part in addition reactions.
Formation of an addition polymer
- The carbon-carbon double bond changes to a single bond.
- They join with other alkenes whose double bonds have broken to a single bond.
- They form an addition polymer.
How to deduce the structure of a monomer from an addition polymer
- Draw the structure of a single repeating unit from the polymer
- Add a double bond between the carbon atoms.
- Remove the two lines at from each side
How to deduce the structure of an addition polymer from a monomer
- Reduce the double bond to single bond (like that of an alkane)
- Add two single bonds at each end of the monomer.
- Add two brackets on both sides (make sure the brackets cut the line you drew in step 2.)
- Add an ’n’ to the bottom right corner of the diagram (outside the brackets)