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Organic Chemistry

Addition Polymerization Reaction Polymers

Addition Polymerization Reaction Polymers

  • Polythene: Polythene is the polymer of ethene molecule. The large number of ethene monomer combine to form polythene.

Polythene is further divided into the following types.

  • Low-Density polythene: It is obtained by polymerization of ethene under high pressure of 1000 to 2000 atm and high temperature of 350 K to 570 K in the presence of a catalyst (dioxygen). 
  • High-Density Polythene: It is obtained by polymerization of ethene in a hydrocarbon solvent in the presence of catalyst triethylaluminium and titanium tetrachloride at a temperature of 333 K to 343 K under pressure of 6-7 atm.
  • Polytetraflouroethane ( Teflon)

It is the inert substances manufactured by heating tetraflouoroethene with a free radical or presulphate catalyst at high pressure.

  • Polyacrylonitrile:  Polyacrylonitrile is the polymer formed by the addition of acrylonitrile in the presence of a peroxide catalyst. It is formed by a condensation reaction.