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All of the following are addition polymers EXCEPT

  • A.polyethylene terephthalate
  • B.polyethylene film
  • C.polyvinyl chloride pipework
  • D.polystyrene packaging

Answer: A

Polyethylene terephthalate is a polyester made by condensation with loss of water. The other three all form by addition across a vinyl double bond. The by-product distinguishes the two mechanisms. Bottle grade resin is the familiar example.

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