Write the names and structures of the monomers of the following polymers:

(i) Buna-S

(ii) Dacron

(iii) Neoprene

(i) Buna-S is prepared from two monomers, 1,3-butadiene () and Styrene ().

Note:

In the name Buna-S, Bu stands for butadiene, na for sodium which acts as polymerizing agent and S stands for styrene.

(ii) Teylene also known as Dacron is prepared by the condensation polymerization reaction of two monomers – Ethylene glycol and Terepthalic acid. Condensation reaction involves the loss of a simple molecule like NH₃, H₂O, HCl, etc(here, H₂O is removed).

(iii) Neoprene (also known as polychloropropene) is a polymer formed from chloroprene which is 2-chloro-1,3-butadiene through polymerization by production of free radicals in the intermediate stages of the reaction. It is thus called free radical polymerization.

Note:-We know hν stands for sunlight and as there is sunlight it is obvious that the reaction will proceed via formation of free radicals.