Condensation polymersAQA A-Level Chemistry: Mind map

Exam questions on Condensation polymers

1. A textile company makes nylon-6,6 fibre by reacting hexanedioic acid, HOOC(CH₂)₄COOH, with 1,6-diaminohexane, H₂N(CH₂)₆NH₂.
   Explain why the formation of nylon-6,6 is classed as condensation polymerisation.2 marks
2. Kevlar is used in body armour and protective helmets. It is made from benzene-1,4-dicarboxylic acid and benzene-1,4-diamine, and its repeating unit is –NH–C₆H₄–NH–CO–C₆H₄–CO–.
   Explain why Kevlar chains are held together very strongly.2 marks
3. Terylene is a polyester used in clothing fibres and, as poly(ethylene terephthalate), in drinks bottles. It is made from benzene-1,4-dicarboxylic acid, HOOC–C₆H₄–COOH, and ethane-1,2-diol, HOCH₂CH₂OH.
   Name the linkage in Terylene and explain why each monomer must have two functional groups.3 marks