Specification Point 4.44:
Know that an addition polymer is formed by joining up many small molecules called monomers

Monomer: The unit molecule from which a polymer is made

Addition Polymers

Formation of addition polymers:

  • Addition polymers are formed by the joining up of many small molecules called monomers.
  • Alkenes can act as monomers as they are unsaturated so the double bond can break and bond with other monomers.

Examples: Formation of poly(chloroethene)

Formation of poly(chloroethene), Edexcel IGCSE Chemistry

The formation of poly(chloroethene) from the joining of many chloroethene monomers

There are two types of polymers:

  1. Natural Polymers.
    e.g.: starch, carbohydrate, fat, protein etc.
  2. Synthetic polymers (Man-made polymers).
    e.g.: polythene, polypropene, polychloroethene (PVC), polystyrene, nylon, terylene.

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Author: Jamie

Jamie got a First class degree in Chemistry from Oxford University before going on to teach chemistry full time as a professional tutor. He’s put together these handy revision notes to match the Edexcel IGCSE Chemistry specification so you can learn exactly what you need to know for your exams.