Question
Chemistry Question on classification of polymers
The monomer used in Novolac, a polymer used in paints
A
Phenol and Formaldehyde
B
Melamine and Formaldehyde
C
Butadiene and Styrene
D
Butadiene and Acrylo Nitrile
Answer
Phenol and Formaldehyde
Explanation
Solution
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