Today, polystyrene is considered a widely used polymer with desirable properties. The use of this polymer is sometimes due to being placed next to another polymer such as polyamide (PA), polyurethane (PU) or polar fillers such as calcium carbonate and talc. It suffers from fragility and phase separation. This limitation is eliminated by using Plaza Masterbatch softener with a consumption percentage of one to two percent. And this challenge is solved when polystyrene is recycled and not combined with another polymer matrix, or without mixing with fillers and pure, with another grade from this collection.