SYNTHETIC FIBRES AND PLASTICS

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SYNTHETIC FIBRES AND PLASTICS

• Ms. ANUPAMA SINGH

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Synthetic fibres or man-made fibres

• Artificial fibres developed using petroleum
  products and coal as raw materials

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POLYMER

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

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MONOMER

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

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Polymerisation

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

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PETROCHEMICALS

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

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• TYPES OF SYNTHETIC FIBRES

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• RAYON

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

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• Rayon is obtained by chemical treatment of wood
  pulp.

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

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

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• Rayon mixed with wool is used to make carpets.