Question

Which of the following is not an example of an additional polymer?
A.Polythene
B.Polystyrene
C.Neoprene
D.Terylene

Answer 1

Addition polymers are those polymers which are formed when monomeric units are chemically bonded together without the formation of any other product. Hence, in addition to polymerization, all the reactant monomers and substituents combine together to form only the desired polymer and no other product.

Complete Step-by-Step Answer:
Before we move forward with the solution of the given question, let us first understand some important basic concepts.
On the other hand, condensation polymers are formed when the reacting monomers give both the desired polymer and some additional by – products as the products of the reaction.
The formation of the given polymers happens either by addition polymerization or condensation polymerization. Let us discuss how these polymers are formed.
1.Polythene:
Polythene is also known as polyethylene. As the name suggests, polythene is formed by the polymerization of a monomer named ethylene. This monomer named ethylene can be polymerised under physical conditions of high pressure and temperature by adding an organic peroxide as radical initiator. The polymerisation takes place by radical mechanism. The complete chemical equation can be given as:

2.Polystyrene:
Polystyrene is formed by the monomer known as styrene. Styrene undergoes polymerisation to form only polystyrene and no other products.

3.Neoprene:
Neoprene is also formed by only one type of monomer, chloroprene. The polymerisation of chloroprene results in the formation of only neoprene without the formation of any other products.

4.Terylene:
The monomers used in terylene are ethylene glycol and terephthalic acid. When the necessary physical conditions are reached, these two polymers result in the formation of terylene as well as water.

Hence, Terylene is formed by condensation polymerisation and not addition polymerisation.

Hence, Option D is the correct option

Note: Terylene fibre is used as polyester tricot knit as a fashion garments fabric. It is also used for laundry usage as an automatic clothing vacuum packaging machine, for making needle punched carpet for exhibition use.