Polyvinyl alcohol is prepared by:

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Question

(B) Polyvinyl alcohol cannot be prepared directly by the polymerization of vinyl alcohol because vinyl alcohol is unstable and tautomerizes to acetald

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Alkaline hydrolysis of polyvinyl acetate

Vedclass · Answer

(B) Polyvinyl alcohol cannot be prepared directly by the polymerization of vinyl alcohol because vinyl alcohol is unstable and tautomerizes to acetaldehyde. It is commercially prepared by the alkaline hydrolysis (or alcoholysis) of polyvinyl acetate. The reaction is: $(CH_2-CH(OCOCH_3))_n + nH_2O \xrightarrow{OH^-} (CH_2-CH(OH))_n + nCH_3COOH$.

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