Question & answer
1. Why are some fibres called synthetic?
2. How fibres is different from yarn and thread?
3. What is the difference between a monomer and a polymer?
4. Why rayon is called an artificial silk?
Answers
Answer:
Explanation:
1. Some fibres are called as synthetic fibers because these are manmade fibers prepared by using chemicals. These are made of small units that join together to form long chains. Some of the examples of synthetic fibres are nylon, rayon, acrylic, polyester etc.
2. The main difference between thread and yarn is that threads are for sewing and embroidery while yarn is used for knitting, weaving and sewing. Threads and yarn are long, thin strands of natural or synthetic fibres. Yarn can make fabrics, sewing, weaving, crocheting, knitting, embroidery and ropemaking.
3. The main difference between monomers and polymers is that the former is the necessary component that forms the latter. Polymers are comprised of a chain of monomers through a process known as polymerization.
4. Rayon is called the artificial silk because it resembles silk both in texture and look. It is cheaper than silk and can be woven like silk fibres. Properties of Rayon: It is strong and easy to dye in a variety of colours. Another useful property of rayon is that it absorbs sweat.