Polyvinyl alcohol (as shown above) is a unique polymer having high affinity for water. Which of the following procedures would be most suitable for its preparation?
A
radical chain polymerisation of CH2=CH−CH2−OH
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B
radical chain polymerisation of CH2=CH−OH
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C
radical chain polymerisation of CH2=CH−CO2CH3, following by base catalysed hydrolysis
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D
radical chain polymerisation of CH2=CH−OCOCH3, followed by acid catalysed hydrolysis
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E
radical chain polymerisation of CH2=CH−OCOCH3, followed by base catalysed hydrolysis
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Solution
The correct option is A radical chain polymerisation of CH2=CH−OH [−CH2−CH∣OH−CH2−CH∣OH−CH2−CH∣OH−]n
Polyvinyl alcohol is prepared by radical chain polymerisation of CH2=CH−OCOCH3, followed by base catalysed hydrolysis in which acetate group is replaced by hydroxide group.