Write the names and structures of the monomers of the following polymers:
(i)Buna-S,(ii)Buna-N
(iii)Dacron,(iv)Neoprene

Explanation

(i) Buna-S : `CH_(2) = CH - CH - CH_(2)` (Buta-1, 3-diene), `C_(6)H_(5)CH = CH_(2)` (styrene) in the presence of sodium (Na)
(ii) Buna-N : `CH_(2) = CH - CH = CH_(2)` (Buta-1, 3-diene), `CH_(2) = CHCN` (Acrylonitrile)
(iii) Dacron : `HOCH_(2)CH_(2)OH` (Ethylene glycol), `HOOC (C_(6)H_(4))COOH` (Terephthalic acid)
(iv) Neoprene : `CH_(2) = underset(Cl)underset(|)(C) - CH = CH_(2)` (2-Chlorobuta-1, 3-diene)