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Which of the following is not prepared by Ziegler-Natta coordination polymerisation?

Which of the following is not prepared by Ziegler-Natta coordination polymerisation? Correct Answer Polyvinyl acetate (PVAc)

Vinyl chloride is polar olefins and such alkenes do not polymerize in the presence of Ziegler-Natta or Kaminsky catalysts.

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