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(B) Polyacrylonitrile is prepared by the free radical polymerization of acrylonitrile $(CH_2=CH-CN)$.Free radical polymerization requires a radical in

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Polyacrylonitrile

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(B) Polyacrylonitrile is prepared by the free radical polymerization of acrylonitrile $(CH_2=CH-CN)$.Free radical polymerization requires a radical initiator,such as a peroxide (e.g.,benzoyl peroxide),to initiate the chain reaction.Nylon $6,6$ and Terylene are prepared by condensation polymerization,while Bakelite is prepared by step-growth polymerization involving phenol and formaldehyde.

Which of the following polymers requires a peroxide as an initiator for its preparation?

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