Question

Which of the following is not correctly matched?

Answer 1

The atoms in a polymer molecule are generally joined together by strong covalent bonds in long chains. There can be a variable number of atoms in the chains of a given polymer. One example of a polymer is poly(ethene).

Complete step by step answer:
Neoprene or polychloroprene is a type of synthetic rubber which is formed by the free radical polymerisation of chloroprene. It is resistant to vegetable and mineral oils and used for manufacture of conveyor belts, gaskets and hoses. The properties of polychloroprene are similar to other diene polymers like polybutadiene and polyisoprene.

Nylon 66 is prepared by the condensation polymerisation of hexamethylene diamine with adipic acid under high temperature and pressure. It is most commonly used in the textile industry and for making bristles for brushes.

Terylene is prepared by the process of condensation polymerization of equimolar ratio ethylene glycol (ethane-1,2-diol) and terephthalic acid (benzene-1,4-dicarboxylic acid) at 140 – 190 degree celsius in the presence of zinc acetate-antimony trioxide catalyst.

PMMA or poly (methyl 2‐methylpropenoate) is obtained from monomers of methyl methacrylate. PMMA, also known as acrylic or acrylic glass, is a type transparent and rigid thermoplastic material which is widely used as a shatterproof replacement for glass. It is resistant to UV light and weathering and has an excellent light transmission.

So, the correct option is (c).

Note: Don't get confused between Nylon 66 and Nylon 6. Nylon 6 can be obtained by heating caprolactam with water at high temperature. It is often used in the manufacturing of tyre, fabrics and ropes.