The monomer used to make polyvinyl chloride, PVC, is
Correct answer: A. chloroethene
- A. chloroethene
- B. chloroethane
- C. ethene
- D. phenol
Explanation
Chloroethene, also called vinyl chloride, has the double bond needed for addition polymerisation and carries the chlorine that gives PVC its rigidity and flame resistance. Chloroethane is saturated and so cannot polymerise by addition, which is the distractor to watch for. PVC is used for pipes, cable insulation and flooring, and plasticisers are added when a flexible product is wanted.
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About Polymers
Polymers are large molecules made from repeating monomer units joined by covalent bonds. The topic distinguishes addition polymers such as polyethylene, PVC and polystyrene from condensation polymers such as nylon and polyester, and relates chain structure to thermoplastics, thermosetting polymers, elastomers, properties, uses and environmental concerns.
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