This definitions covers Key Definitions within Polymers for GCSE Chemistry. Revise Polymers in Organic Chemistry for GCSE Chemistry with 20 exam-style questions and 14 flashcards. This topic shows up very often in GCSE exams, so students should be able to explain it clearly, not just recognise the term. It is section 10 of 15 in this topic. Make sure you can use the exact wording confidently, because definition marks are often lost through vague language.
📖 Key Definitions
Monomer: A small molecule that can join together with many identical or similar molecules to form a polymer. For addition polymerisation, monomers must contain a C=C double bond.
Polymer: A very large molecule made up of many repeating monomer units joined together in a long chain. The physical and chemical properties depend on the monomer used and the type of polymerisation.
Addition polymerisation: The joining of many alkene monomers together through the opening of their C=C double bonds. Only one product is formed — the polymer. No small molecules are released.
Condensation polymerisation: A type of polymerisation where monomers join by reacting two functional groups, releasing a small molecule (usually water) as a by-product. Used to make nylon, proteins, and starch.
Practice questions for Polymers
What type of monomers are needed for addition polymerisation?
Explain how addition polymerisation works. Include the role of the double bond.