Polymer Technology
__________ is produced by polymerisation of chloroprene.

Thiokol (a polysulphide rubber)
Butyl rubber
Neoprene
Polyurathane rubber

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Polymer Technology
Thermocole (expanded polystyrene) is not used for

Packing of delicate electronic gadgets
Accoustic control and ceiling for building
High temperature thermal insulation in furnaces
Low temperature thermal insulation as in refrigerator and air conditioners

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