What is an addition polymer, and how is it formed from alkenes?

An addition polymer is a large molecule formed by the joining of many small molecules called monomers, which contain a carbon-carbon double bond (C=C). During the polymerization process, the double bonds in the alkene monomers open up, allowing them to link together to form a long chain without the loss of any small molecules.

This answer demonstrates an understanding of the concept of addition polymers and the process of polymerization, specifically relating to alkenes. It tests the student's ability to explain the formation of polymers from their monomers. This response is aligned to Polymerisation and naturally occurring polymers because it explains recognise addition polymers and monomers from diagrams and from the presence of the C=C functional group in the monomers using the correct AQA GCSE Chemistry organic context. Keep molecular formula, structural formula, displayed formula, and general formula distinct. Do not confuse alkanes with alkenes, saturated with unsaturated, cracking with combustion, polymers with monomers, or hydrocarbons with oxygen-containing alcohols and carboxylic acids. When formulae are used, preserve the stored notation exactly and explain the GCSE chemistry idea in words rather than using unsupported displayed-formula diagrams. This response is aligned to Polymerisation and naturally occurring polymers because it explains recognise addition polymers and monomers from diagrams and from the presence of the C=C functional group in the monomers using the correct AQA GCSE Chemistry organic context. Keep molecular formula, structural formula, displayed formula, and general formula distinct. Do not confuse alkanes with alkenes, saturated with unsaturated, cracking with combustion, polymers with monomers, or hydrocarbons with oxygen-containing alcohols and carboxylic acids. When formulae are used, preserve the stored notation exactly and explain the GCSE chemistry idea in words rather than using unsupported displayed-formula diagrams.