Polymer _polystyrene_

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Polymer _polystyrene_ Powered By Docstoc
					Polymer
Polystyrene or Polyphenylethene
Monomers:
Phenylethene or Ethenyl
Benzene or vinyl benzene (styrene)
Uses:
        CD and cassette tape containers
        Plastic drinking glasses
        Fast- food containers
        Packaging materials
        Insulation
Properties of all types of polystyrene:
Physical              Chemical
        Good electrical,     >Incomplete
         heat and sound       combustion in air and
         insulation           burns a smoky flame
        High Stiffness       > safety hazard if
         (from the            contact to skin due to
         benzene rings)       the ability to stick to
        Brittle (10% of      skin and cause severe
         butadiene creates    burns
         clearness and        >different colours with
         stronger)            different polystyrene
        High refractive      manufactured
         index                -crystal (clear)
        1.047g/cm^3          -expanded ( is coloured)
         density
        M.P 240˚C



Formation:
polystyrene is involves an condensation addiction polymerisation reaction.

				
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posted:3/7/2012
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