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  4. The monomer used in Novolac, a polymer used in paints

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Q. The monomer used in Novolac, a polymer used in paints

KCETKCET 2017Polymers

Solution:

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Novolacs are phenol formaldehyde resins with formaldehyde to phenol molar ratio of less than one. The polymerisation is brought to completion using acid catalysis such as oxalic acid, hydrochloric acid or sulphonate