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Phenol and formaldehyde undergo condensation to give a polymer (A) which on heating with formaldehyde gives a thermo- setting polymer (B). Name the polymers. Write the reactions involved in the formation of (A). What is the structural difference between two polymers ? |
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Answer» Solution :Phenol and formaldehyde undergo CONDENSATION to give a polymer NOVOLAC (A) Which arc heating with formaldehyde GIVES BAKELITE (B) as a thermosetting polymer. Sequences of the reaction can be WRITTEN as  Structural differences in between Novolac and bakelite is that nonolac is a lnear polymer while bakelite is a cross linked polymer. 
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