Question

Write any two differences between addition and condensation polymerization.

Answer 1

Hint: Polymerization is a procedure of reacting monomer atoms together in a chemical reaction to frame polymer chains or three-dimensional networks. For example - polyethylene, nylon, PVC.

Complete step-by-step answer:

ADDITION POLYMERIZATION	CONDENSATION POLYMERIZATION

1. Addition polymerization is the procedure of repeated addition of monomers, having double or triple bonds to frame polymers. For example, polythene is formed by the addition polymerization of ethene.${{nCH_2=CH_2}\longrightarrow {-(CH_2-CH_2)}_n-}$| 1) Condensation polymerization is the procedure of the formation of polymers by repeated condensation reactions between two distinctive bi-functional or tri-functional monomers. A small molecule such as hydrochloric acid or water is eliminated in each condensation reaction. For example, By condensation polymerization of hexamethylenediamine and adipic acid, ${ nylon 6,6 }$ will be formed.
2. It involves mostly one monomer unit.| 2) It involves more than one monomer.
3. Monomers are unsaturated.| 3) Monomers have two or more functional groups.
4. They are chain-growth polymers.| 4) They are generally step-growth polymers.
5. Loss of small molecules like ${ H }_{ 2 }{ O, NH }_{ 3 }$ and NaCl does not take place.| 5) Loss of small molecules ${ H }_{ 2 }{ O, NH }_{ 3 }$ and NaCl will take place.
6. The molecular weight of the resulting polymer is an integral multiple of the monomer’s molecular weight.| 6) The molecular weight of the resulting polymer is an integral multiple of the monomer’s molecular weight.

Note: The possibility to make a mistake is that in addition polymers hetero-chain polymers are formed but in this homo-chain polymers are formed not hetero-chain polymers.