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POLYMER

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POLYMER

  1. 1. POLYMER SUBMITTED BY Naveenkumar.r (mech) Mohamed basha.m (mech) Avs engineering college salem
  2. 2. CONTENT  INTRODUCTION  CLASSIFICATION OF POLYMER  TYPES OF POLMERIZATION  CHARATERISTICS OF POLYMER  APPLICATION OF POLYMERS
  3. 3. INTRODUCTION A WORD POLYMER IS A COMBINATION TWO GREEK WORDS “POLY” MEANS “MANY” AND “MEROS” MEANING “PARTS OR UNITS” .
  4. 4. classification of polymer Classification based on source Classification based on structure Classification based on polymerization Classification based on molecular force
  5. 5. classification based on source Natural polymer The polymers obtained from nature e.g: starch Synthetic polymer The polymers which are prepared in the laboratories e.g:nylon
  6. 6. CLASSIFICATION BASED ON STRUCTURE LINEAR POLYMERS CROSS LINKED CHAIN POLYMER BRANCHED CHAIN POLYMERS
  7. 7. LINEAR POLYMER  CONSIST OF LONG AND STRAIGHT CHAINS . EXAMPLE : pvc
  8. 8. BRANCHED CHAIN POLYMERS CONTAING LINEAR CHAIN HAVING SOME BRANGES EXAMPLE : low density polymer
  9. 9. CROSS LINKED CHAIN POLYMER FORMED FROM BI-FUNCTIONAL MONOMERS AND CONTAINS STORNG COVALENT BONDS example : bakelite
  10. 10. CLASSIFICATION BASED ON POLYMERISATION
  11. 11. Classification based on molecular force  Nylon : nylon is used as general name for all synthetic fiber forming polyamides . It is formed by “ hexamethylene diamine” and “adipic acid” n[H2N-(CH2)6-NH2 + HOOC-(CH2)4-COOH] HEXAMETHYLENE ADPIC ACID DIAMINE -(NH-(CH2)-NH-CO-( CH2)4-CO)-n+2nH2O (nylon6:6)
  12. 12. TYPES OF POLYMERIZATION CO- POLYMERI ZATION CONDE NSATIO N ADDITI ON
  13. 13. addition polymerization ADDITION POLYMERS : FORMED BY THE REPEATED ADDITION OF MONOMER MOLECULES POSSING DOUBLE OR TRIBLE BONDS . example: polyethylene is produced from ethylene HEAT/PRESSURE n CH2=CH2 ….-(CH2-CH2)-n catalyst ethylene polyethylene(pe)
  14. 14. Condensation polymerisation FORMED BY CONDENSATION REACTION BETWEEN TWO DIFFERENT BI-FUNCTIONAL AND TRI- FUNCTIONAL MONOMERIC UNITS example : hexamethylene diamine and adipic acid condense to form a polymer , nylon 6:6 nH2N-(CH2)-NH2 + n HOOC-(CH2)4-COOH HEXAMETHYLENE ADIPIC ACID DIAMINE -[HN-(CH2)6-NH-CO-(CH2)-CO]-n ( NYLON 6:6)
  15. 15. CO-POLYMERISATION IT IS THE JOINT POLYMERISATION IN WHICH TWO OR MORE DIFFERENT MONOMERS COMBINE TO GIVE A POLYMER .HIGHMOLECULAR WEIGHT POLYMER OBTAINED BY COPOLYMERISATION n[CH2=CH-CH=CH2]+nCH2=CH (butadiene) C6H5 (styrene) -(CH2-CH=CH-CH2-CH2-CH)-N C6H5 (styrene butadiene rubber)
  16. 16. Characteristics of polymer low density Low coefficient of friction Good corrosion resistance Economical Poor tensile strength Low mechanical properties Poor temperature resistance
  17. 17. APPLICATION OF POLYMER MEDICINE : MANY BIOMATERIALS ESPECIALLY HEAT VALUE REPLACEMENT AND BLOOD VESSELS ,ARE MADE OF POLYMER LIKE DACRON,TEFLON AND POLYURETHANE . blood vessels medicine
  18. 18. CONSUMMER SCIENCE PLASTICS CONTAINERS OF ALL SHAPES AND SIZE ARE LIGHT WEIGHT AND ECINAMICALLY LESS EXPENSIVE THAN THE MORE TRIDITIONAL CONTAINERS . Floor coverings packing
  19. 19. INDUSTRY AUTOMOBILES PARTS , WIND SHIELD FOR FIGHTER PLANES , PIPES ,TANKS , PAKING MATERIALS ARE ALL POLYMERISATION USED IN THE INDUSTRIAL MARKET . wood substitutes tanks
  20. 20. sports Play ground equipment , varies balls , golf clubs ,swimming pools and protective helmet

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