Polystyrene refers to a polymer synthesized from a styrene monomer through a radical polycondensation reaction. The English name is polystyrene, and the Japanese name is , referred to as PS. It is a colorless and transparent thermoplastic with a glass transition temperature higher than 100 degrees Celsius, so it is often used to make a variety of disposable containers that need to withstand boiling water temperatures, and disposable foam lunch boxes.
