Question

Which one of the following is not a condensation polymer?
A.Dacron
B.Neoprene
C.Glyptal
D.Melamine

Answer 1

Polymerization is a process of combining or adding two or more monomers through chemical reactions forming long polymer chains or three-dimensional structures. There are two types of polymers, Condensation and Addition. Also, Neoprene is an additional polymer.

Complete answer:
Polymerization is a process in which relatively small molecules, called monomers, combine chemically to produce a very large chainlike or network molecule, called a polymer. The basic fundamental unit of polymers which reacts with another fundamental unit to form a bigger molecule is known as a monomer.
There are two basic types of polymerization, that is addition polymerization and condensation polymerization.
Condensation polymerization- When repetitive condensation between two bi-functional monomers occurs, then the polymers are said to undergo condensation polymerization. Examples of molecules that undergo condensation polymers are Nylon-6, Dacron (or terylene) and Glyptal, etc.
Neoprene is not a condensation polymer. It is an additional polymer.
Neoprene is formed by the free radical or monomer polymerization of chloroprene (2-chloro-1, 3-butadiene). It is homopolymer wherein superior resistance to vegetable and mineral oils. Neoprene is used in manufacturing conveyor belts, gaskets, hoses. Dacron, Melamine and Glyptal are condensation polymers.
Dacron (also known as terylene) is a polyester made by condensation polymerisation of ethylene glycol and dimethyl terephthalate. Glyptal is a copolymer of ethylene glycol and phthalic acid. Melamine (or formaldehyde melamine polymer) is obtained from condensation polymerisation of melamine with formaldehyde.

Therefore, the correct answer is option (B).

Note: Neoprene, also called polychloroprene or chloroprene rubber, synthetic rubber produced by the polymerization (or linking together of single molecules into giant, multiple-unit molecules) of chloroprene.