Question 1 What is a polymer?
Question 2 Name the natural polymer from which cotton is made?
Question 3 Name the units of which cellulose polymer is made?
Question 4 Define the term monomer?
Question 5 What are fibres?
Question 6 What are natural polymers.Give example?
Question 7 What are synthetic polymers.Give example?
Synthetic fibres and plastics
A very thin thread like strand from which cloth is made is called a fibre.
Fabric is made by weaving or knitting long,twisted threads called yarn made from fibres.
The clothes we wear are made of fabrics.
The fibres can be divided into 2 groups:
1)Natural fibres:The fibres obtained from plants and animals.
2)Synthetic fibres:They are made by human beings.
For Ex:Rayon,nylon,polyester,acrylic etc.
A polymer is a very big molecule formed by the combination of a large number of small molecules.
The small molecules which join together to form a polymer is called monomer.The monomer which make a polymer may be of the same compound or of different compounds.
Polymers are of 2 types:
Cotton fibre is made of a natural polymer called cellulose.
Cellulose is a polymer which is made up of a large number of small glucose molecules joined one after the other.The walls of all plants cells are made up of cellulose.
2)Synthetic polymer:Nylon,polyester,acrylic,poly ethene,polyvinylchloride,bakelite,melamine.
Nylon fibres is made of up nylon polymer in which two different types of molecules are combined alternately to form long chains.