Addition polymers and polymer disposalEdexcel International A Level Chemistry: Mind map

Exam questions on Addition polymers and polymer disposal

1. A packaging company makes reusable storage crates from poly(propene). The polymer is produced by heating propene under pressure with a catalyst, and the company recycles off-cuts from the moulding process.
   Draw the repeat unit of poly(propene) and explain, in terms of the structure of propene, why its formation is an addition polymerisation.2 marks
2. An electrical contractor specifies poly(chloroethene), PVC, as the insulation for cables because it is flexible and does not conduct electricity. PVC is made by addition polymerisation of chloroethene, CH₂=CHCl.
   Explain why bromine water is decolourised by chloroethene but not by PVC.2 marks
3. A non-stick pan manufacturer coats its pans with poly(tetrafluoroethene), PTFE. The repeat unit of PTFE is –CF₂–CF₂–. A chemist at the company is preparing advice on what should happen to the polymer at the end of the product's life.
   Deduce the structural formula and name of the monomer used to make PTFE, and write an equation, using n, for its polymerisation.3 marks