Difference Between Addition and Condensation Polymerization

Addition Polymerization

Condensation Polymerization

1.      1. Only olefin compounds can undergo addition polymerization. 2.    Polymerization proceeds through self-addition of monomers. 3.                  There is absolutely no elimination of any by products.  4.    The polymer chain is build up very rapidly (free radical chain reaction). 5.    The addition polymerization is brought about by free radicals, ionic or co-ordination mechanism. 6.    Linear polymers are produced. 7.    The polymer produced has the same elemental composition as that of the monomer. 8.    The molecular weight of polymer is an integral multiple of that of the monomer.

The monomers having two or more reactive functional groups can undergo condensation polymerization.  2. Polymerization proceeds through intermolecular condensation. 3. There is continuous elimination of byproducts. 4. The polymer chain build up is slow and step wise. 5. Polymerization is catalyzed by acids or alkali. 6. Linear or cross linked polymers are produced. 7. The elemental composition of the polymer is generally different from that of its monomers. 8. The molecular weight of polymer is not an integral multiple of that of the monomer.