STRUCTURE AND
PROPERTIES OF POLYMER
BY
HARATHI.J
INTRODUCTION
• Polymer and polymerisation.
• Types of monomers.
• Types of polymerisation.
• Types of polymers.
• Uses
Polymer and Polymerisation
A long molecule made up
from lots of small
molecules called
monomers.
Combinging large no.of
mo...
All the same monomer
• Monomers all same
type (A)
• A + A + A + A 
• -A-A-A-A-
• eg poly(ethene)
polychloroethene
PVC
Different monomers
• Monomers of two
different types A + B
• A + B + A + B
 -A-B-A-B-
• eg polyamides
• polyesters
TYPES OF
POLYMERISATION
1.Addition polymerisation
2.Condensation polymerisation
• Free radical,ionic-cationic and
anionic,...
Elastomers, plastics & fibres
• Examples:
Thermoplastics (80%)
• No cross links between chains.
• Weak attractive forces between chains broken by
warming.
• Change ...
Thermosets
• Extensive cross-linking formed by
covalent bonds.
• Bonds prevent chains moving relative to
each other.
• Wha...
Crystalline polymers
• Areas in polymer where
chains packed in regular way.
• Both amorphous and
crystalline areas in same...
Cold-drawing
• When a polymer is stretched a ‘neck’ forms.
• What happens to the chains in the ‘neck’?
• Cold drawing is u...
POLYMERS USED IN
1.plastic pipes, industries machines
2.electric insulators,medicines
3.in suitcases , purses, school bags...
I AMTHANKFULL TO CORRESPONENT WHO GAVE ME THIS OPPURTUNITY
AND
ALSO FOR PRASAD SIR AND NALINI MAM WHO ENCOURAGED AND ME TO...
THANKING YOU
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Harathi

  1. 1. STRUCTURE AND PROPERTIES OF POLYMER BY HARATHI.J
  2. 2. INTRODUCTION • Polymer and polymerisation. • Types of monomers. • Types of polymerisation. • Types of polymers. • Uses
  3. 3. Polymer and Polymerisation A long molecule made up from lots of small molecules called monomers. Combinging large no.of monomeric units to form a polymer is known as poolymerisation
  4. 4. All the same monomer • Monomers all same type (A) • A + A + A + A  • -A-A-A-A- • eg poly(ethene) polychloroethene PVC
  5. 5. Different monomers • Monomers of two different types A + B • A + B + A + B  -A-B-A-B- • eg polyamides • polyesters
  6. 6. TYPES OF POLYMERISATION 1.Addition polymerisation 2.Condensation polymerisation • Free radical,ionic-cationic and anionic,coordination
  7. 7. Elastomers, plastics & fibres • Examples:
  8. 8. Thermoplastics (80%) • No cross links between chains. • Weak attractive forces between chains broken by warming. • Change shape - can be remoulded. • Weak forces reform in new shape when cold.
  9. 9. Thermosets • Extensive cross-linking formed by covalent bonds. • Bonds prevent chains moving relative to each other. • What will the properties of this type of plastic be like?
  10. 10. Crystalline polymers • Areas in polymer where chains packed in regular way. • Both amorphous and crystalline areas in same polymer. • Crystalline - regular chain structure - no bulky side groups. • More crystalline polymer - stronger and less flexible.
  11. 11. Cold-drawing • When a polymer is stretched a ‘neck’ forms. • What happens to the chains in the ‘neck’? • Cold drawing is used to increase a polymers’ strength. Why then do the handles of plastic carrier bags snap if you fill them full of tins of beans?
  12. 12. POLYMERS USED IN 1.plastic pipes, industries machines 2.electric insulators,medicines 3.in suitcases , purses, school bags e.t.c,………
  13. 13. I AMTHANKFULL TO CORRESPONENT WHO GAVE ME THIS OPPURTUNITY AND ALSO FOR PRASAD SIR AND NALINI MAM WHO ENCOURAGED AND ME TO DO THIS PROJECT. MY SPECIAL THANKS WHO HELPED ME LOT AND FOR AUDIENCE FOR PATIENCE LISTINING
  14. 14. THANKING YOU

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