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Polystyrene (PS) is a polymer of which the monomer (the repeated species) is styrene, formed of a benzene ring attached to a CH-CH2chain. It is obtained from petroleum-derived products.

Polystyrene is hard and strong. It can be mixed with a gas to obtain a very light material. Polystyrene is used as thermal or acoustic insulation, in packaging (for protection from shocks) or low density filling (e.g. to obtain buoyancy).

Two types of polystyrene can be produced:

Polystyrene sheets. © DR Polystyrene sheets. © DR



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