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"Additional Polymerisation, monomers join together without the loss of atoms from the molecule." (Reference 1) Additional polymerisation is the process in which many monomers bond together to produce large chains called 'Polymers'. Polyethene is an example of this. It is made of many ethene monomers linked together as one, commonly known as polythene. In additional polymerisation, all the monomers are alkenes (contain a carbon-carbon double bond). It is respectively this double bond that breaks and splits to form bonds with other ethene molecules. (Reference 3) There are certain conditions that need to be met for the reaction to be carried out efficiently. These are: Temperature: About 200°C Pressure: About 2000 atmospheres Initiator: A small amount of oxygen as an impurity This process starts with a new radical being donated, (a species with an unpaired electron.) In this case, it is donated from the oxygen, it is created by breaking the oxygen-oxygen bond, in such a way that the two electrons...

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