PS

Polystyrene (PS) is a synthetic polymer made from monomers of the aromatic hydrocarbon styrene. Polystyrene can be solid or fomed. General-purpose polystyrene is clear, hard, and brittle. As a thermoplastic polymer, polystyrene is in a solid (glassy) state at room temperature but flows if heated above about 100 °C, its glass transition temperature.and also  It has wide applications in various industries including packaging, construction, and automotive.