Polytetrafluoroethene (PTFE ) or Teflon : Its monomer unit is tetrafluoroethene molecule. It is prepared by heating tetrafluoroethylene at high pressure in the presence of peroxides or ammonium peroxosulphate catalyst. It is chemically inert and resistant to attack by corrosive reagents. Teflon is flexible and inert to solvents and to boiling acids even to aqua regia and is stable upto 598 K hence used to manufacture non-stick cookwares.

Arrange the following polymers in the increasing order of their intermolecular forces : Nylon- 6 , neoprene, polyvinyl chloride.

Neoprene is synthetic rubber having weak intermolecular forces hence categorised in elastomers. Nylon- 6 is a fibre having dipole-dipole interactions and polyvinyl chloride is a thermoplastic whose intermolecular forces of attraction are in between those of elastomers and fibres. Thus, increasing order of intermolecular forces : Neoprene < polyvinyl chloride < nylon- 6 .