Polymer

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POLYMERS
STANDARD XII- SCIENCE
SUBJECT CHEMISTRY
MARKS 3-4 MARKS
PROFESS AZEEM SIR
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• Polymer-
• Greek (poly- many and meros- repeating unit)
• Monomer- small molecules which joint together to
  give a large no. of molecule.

Golden orb spider- this spider release silk which
is stronger then Still more elastic then Nylon,
lightweight. catch insect, birds.
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The process by which monomers are converted into
polymers is called as polymerization.
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Flax seed
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Linen- sooty kapda
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Acetate Rayon
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Teflon
Teflon
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Bakelite
Teflon
Bakelite
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Pi bond is break. And 2 electron come to both
side and joint by another ethylene molecule
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Catalyst
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Due to high heat one carbon loss there hydrogen.
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Other repeating attached to that carbon which
loss the H-atom.
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Bakelite preparation and Mechanism
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Name of polymer Class of polymer Name of monomer Uses
Dynel Copolymer Vinyl chloride and acrylonitrile Human hair wigs
Glyptal Copolymer Ethylene glycol and phthalic acid In paints
Thiokol Condensation(polysulphide rubber) Ethylene chloride and sodium tetra sulphate. Rubber
Superglue Homopolymer Methyl a- cyanoacrylate Glue
Kevlar Polyamide condensation Terephtalic acid chloride and p-phenylene diamine Bullet proof, vasts and helmets.
Nomex Polyamide condensation m-phthalic acid and m-dinitrobenzene Protective clothes for race car drivers and fire fighters.
Lexan Polycarbonate, polyester condenstation Diethylcarbonate and bisphenol A Bullete proof window, helmet.
Polyurethane or thermocole Copolymer Vinyl chloride and vinylidene chloride Bumpers