SYNTHETIC FIBRES AND SYNTHETIC FIBRES AND PLASTICSPLASTICS

• Ms. ANUPAMA SINGHMs. ANUPAMA SINGH

Synthetic fibres or man-Synthetic fibres or man-made fibresmade fibres

Artificial fibres developed Artificial fibres developed using using petroleumpetroleum productsproducts and and coalcoal as raw materials as raw materials

POLYMERPOLYMER• Many small units (Many small units (chemicalchemical

substancessubstances) combined together ) combined together to form a large single unit is to form a large single unit is called a polymer.called a polymer.

• Example: Example: CottonCotton or or cellulosecellulose

MONOMERMONOMER•The repeat unit (The repeat unit (chemicalchemical

substancesubstance) of a polymer ) of a polymer is called its monomer.is called its monomer.

•Example: Example: glucoseglucose is a is a monomer of monomer of cottoncotton. .

PolymerisationPolymerisation•The process by The process by which which artificialartificial fibresfibres are made from are made from simple molecules.simple molecules.

PETROCHEMICALSPETROCHEMICALS

•RawRaw materialsmaterials obtained obtained from from petroleumpetroleum and used and used for preparing synthetic for preparing synthetic fibres.fibres.

•ExampleExample: petrol, diesel, : petrol, diesel, kerosene etc.kerosene etc.

•TYPES OF TYPES OF SYNTHETIC SYNTHETIC FIBRESFIBRES

•RAYONRAYON

• RayonRayon is also called is also called as as artificialartificial silksilk due to due to its properties which its properties which are similar to that of are similar to that of silksilk..

• RayonRayon is obtained is obtained by chemical by chemical treatment of treatment of woodwood pulppulp..

•RayonRayon is known as a is known as a regeneratedregenerated fibrefibre as as it is made from a it is made from a naturalnatural fibrefibre by man. by man.

•RayonRayon mixed mixed with with cottoncotton is is used to make used to make bedbed sheetssheets..

•RayonRayon mixed mixed with with woolwool is used is used to make to make carpetscarpets..