Basic objective of this lecture is to focus on Addition Polymerisation. Molecules of Alkenes are referred to as Monomer molecules. If they are added together, with no other compounds being involved, the process is called Addition Polymerisation. The formation of poly(ethene) from ethene is an example of addition polymerisation. In addition polymerisation small unsaturated monomers join up by the opening of the doublebond allowing them to join up to form a long carbon chain.