Abstract: In this article, the recent research status of fireretardance of polystyrene by halogencontaining and nonhalogen flame retardants was reviewed. The advances and shortcomings of bromostyrene, decabromodiphenyl, brominated epoxy, metal hydroxide, and clay based flame retardants and intumescent flame retardants were introduced. Finally, efficient and environmentally friendly nonhalogen flame retardants were emphasized.

Key words: polystyrene, foam, flame retardant