Polystyrene is a synthetic polymer made from monomers of the aromatic hydrocarbon styrene. Polystyrene can be solid or foamed. General-purpose polystyrene is clear, hard, and brittle. It is a poor barrier to oxygen and water vapour and has a relatively low melting point.
Plaque - Matériau plan d'une épaisseur supérieure ou égale à 0,5mm.