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SYNTHETIC FIBRES AND PLASTICS

SYNTHETIC FIBRES AND PLASTICS. Ms. ANUPAMA SINGH. PLASTICS. It is a polymer which can be moulded into various shapes, can be recycled , remoulded and reused . TYPES OF PLASTICS. Plastics are of two types: Thermoplastics Thermosetting plastics. THERMOPLASTICS.

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SYNTHETIC FIBRES AND PLASTICS

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  1. SYNTHETIC FIBRES AND PLASTICS • Ms. ANUPAMA SINGH

  2. PLASTICS • It is a polymer which can be moulded into various shapes, can be recycled, remoulded and reused.

  3. TYPES OF PLASTICS • Plastics are of two types: • Thermoplastics • Thermosetting plastics

  4. THERMOPLASTICS • Plastics which can be moulded on heating and used again. • Example: polythene, PVC.

  5. The arrangement of particles (monomers) in thermoplastics is linear and these can be recycled.

  6. POLYTHENE • Monomer: ethene • Use: for making polythene bags, toys and combs.

  7. PVC (POLY VINYL CHLORIDE) • Monomer: vinyl chloride • Use: for making pipes, toys and combs.

  8. THERMOSETTING PLASTIC • Plastic which once set cannot be moulded on heating. • Example: Bakelite and melamine.

  9. The arrangement of particles (monomers) in thermosetting plastic is crosslinked and these cannot be recycled.

  10. BAKELITE • It is a poorconductor of heat and electricity. • Use: for making electrical switches, handles of various utensils.

  11. MELAMINE • It is resistant to fire and can tolerate heat. • Use: for making floor tiles, kitchen ware and fabrics which resist fire.

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