Question
How is Novolac prepared?###Write the reaction to prepare Novolac polymer.
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Answer
The monomers phenol and formaldehyde undergo polymerisation in the presence of alkali or acid as catalyst.
Phenol reacts with formaldehyde to form ortho or p-hydroxy methyl phenols, which further reacts with phenol to form a linear polymer called Novolac. It is used in paints.
Phenol reacts with formaldehyde to form ortho or p-hydroxy methyl phenols, which further reacts with phenol to form a linear polymer called Novolac. It is used in paints.
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