Write the structure of monomers used for getting the following polymers:
(i) Nylon-6,6
(ii) Glyptal
(iii) Buna - S
OR
(i) Is [CH2−

CH3

| CH

]n a homopolymer or copolymer? Give reason.
(ii) Write the monomers of the following polymer: (iii) What is the role of sulphur in vulcanization of rubber?