Explain Condensation Polymerization

Condensation Polymerization:

When each of the two reacting molecules has only one functional group, the reaction stops after one step. Acetic acid and ethyl alcohol react to form ethyl acetate in one step:

H₃CCOOH + C₂H₅OH-------> H₃CCOOC₂H₅ + H₂0

When one of the following reacting molecules is bifunctional and the other one is  monofunctional, e.g., acetic acid and ethylene-glycol,

H₃CCOOH + HOCH₂CH₂OH--------->

H₃CCOOCH₂CH₂OH + H₂O                  (I)

H₃CCOOCH₂CH₂OH + CH₃COOH  ----------->

H₃CCOOCH₂CH₂OCOCH₃                   (II)

When both the reactants are bifunctional, they undergo a series of condensation reactions in a controlled step wise manner with the elimination of water to form polymers, and the process is called condensation polymerization.