SYNTHETIC FIBRES AND PLASTICS Ms. ANUPAMA SINGH

Synthetic fibres or man- made fibres Artificial fibres developed using petroleum products and coal as raw materials Artificial fibres developed using petroleum products and coal as raw materials

POLYMER Many small units (chemical substances) combined together to form a large single unit is called a polymer.Many small units (chemical substances) combined together to form a large single unit is called a polymer. Example: Cotton or celluloseExample: Cotton or cellulose

MONOMER The repeat unit (chemical substance) of a polymer is called its monomer.The repeat unit (chemical substance) of a polymer is called its monomer. Example: glucose is a monomer of cotton.Example: glucose is a monomer of cotton.

Polymerisation The process by which artificial fibres are made from simple molecules.The process by which artificial fibres are made from simple molecules.

PETROCHEMICALS Raw materials obtained from petroleum and used for preparing synthetic fibres.Raw materials obtained from petroleum and used for preparing synthetic fibres. Example: petrol, diesel, kerosene etc.Example: petrol, diesel, kerosene etc.

TYPES OF SYNTHETIC FIBRESTYPES OF SYNTHETIC FIBRES

RAYONRAYON

Rayon is also called as artificial silk due to its properties which are similar to that of silk. Rayon is also called as artificial silk due to its properties which are similar to that of silk.

Rayon is obtained by chemical treatment of wood pulp. Rayon is obtained by chemical treatment of wood pulp.

Rayon is known as a regenerated fibre as it is made from a natural fibre by man.Rayon is known as a regenerated fibre as it is made from a natural fibre by man.

Rayon mixed with cotton is used to make bed sheets.Rayon mixed with cotton is used to make bed sheets.

Rayon mixed with wool is used to make carpets.Rayon mixed with wool is used to make carpets.