Polymer Technology
Styrene butadiene rubber (SBR) is never used for making

Gaskets
Front wheel tyres of aeroplanes (i.e., heavy duty tyres)
Soles of shoes
Coated fabrics

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Polymer Technology
Thermocole (expanded polystyrene) is not used for

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

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