Question

Which of the following polymers are used as fibre?
A.Nylon
B.Polytetrafluoroethylene
C.Terylene
D.Buna-S

Answer 1

To answer this question, you must recall the properties of various polymers. To be used as a fibre, the polymer should be elastic, have good strength and must be resistant to mildew.

Complete step by step answer:
Nylon is a silky thermoplastic polymer which has various properties that make it suitable for use as fibres. It has compact molecular structure and has high elasticity and tenacity. It has good weathering properties. It does not crease easily when worn and creases and pleats required may be heat set at high temperatures. Nylon has the ability to look lustrous, dull or semi- lustrous in appearance. Another advantage of nylon is that it does not catch fire unlike cotton and rayon that are combustible. Nylon fibres also have high resistance to fungi, insects, animals, mildew, molds, rot and many various chemicals.
Due to all these properties, nylon polymers have many applications commercially and used in fabrics and fibres, namely clothing, flooring and rubber reinforcements, in molds for cars, electrical equipment, etc.

Hence, the correct answer is A.

Note:
Natural fibers are fibers obtained from natural sources like plants and animals. Various natural fibers are cotton, silk, wool etc.
Synthetic fibers are those fibers that are made by human beings in laboratories. They are polymers formed by repeating units of various monomers. Various synthetic fibers used commonly are nylon, acrylics and polyesters. Synthetic fibers are preferred as they are durable and elastic. Synthetic fibers are strong, soft and cheaper as compared to natural fibers.