(a) Give an example of a synthetic rubber and mention its main advantage.
(b) Write the structure of the monomers of Dacron
(c) Arrange the given polymers in the increasing order of tensile strength Nylon-6, Buna-S, Polythene

Explanation

Intermolecular forces of attraction is a measure of the tensile strength of a polymer. Since elastomers have the weakest intermolecular forces of attraction followed by plastics while fibres have the strongest forces of attraction. In other words. intermolecular forces of attraction increase in the order : elastromers `lt` plastics `lt` fibres, i.e.,
(i) Neoprene `lt` Polythene `lt` Terylene
(ii) Bnua `lt` Polystyrene `lt` Terylene