Write the structure of Monomers used to obtain the following polymers:

(a) Buna-S

(b) Glyptal

(c) Nylon-6

OR

(a) Arrange the following polymers in increasing order of their intermolecular forces: Polyvinylchloride, Neoprene, Terylene.

(b) Write one example each of

(i) Natural Polymer

(ii) Thermosetting polymer

(c) What is the significance of numbers 6,6 in Nylon-6,6?

(a) The monomers of Buna- S are styrene and 1,3- Butadiene.

(b) The monomers of Glyptal are Ethylene glycol and Phthalic acid.

(c) The monomer of Nylon-6 is caprolactum.

OR

(a) Polyvinyl chloride is thermoplastic polymer, Neoprene is an elastomer and Terylene is a fibre. The intermolecular forces are strongest in fibres then in plastics and weakest in elastomers. Thus, polymers in increasing order of intermolecular forces are arranged as follows-

Neoprene < Polyvinyl Chloride < Terylene

(b)

(i) Example of Natural Polymer is Rubber. Natural rubber may be considered as a linear polymer of isoprene (2-methyl-1, 3-butadiene) and is also called as cis - 1, 4 polyisoprene.

(ii) Example of Thermosetting polymer is Bakelite.

(c) Nylon 6,6 is a condensation polymer of adipic acid and hexamethylene diamine and both of these contains 6 carbon atoms. Thus, its name is Nylon 6,6.