Polystyrene (PS) is one of the commonly used polymer in food packaging, that is why it generates a large amount of residue PS: Due to the need of reduce environmental damage that occurs, it is common recycle this polymer.Recycling of PS may be affected by the introduction of biodegradable polymer in industrial food. For this reason we have studied the influence that generates small amounts of biodegradable polymer (PLA, PHB and TPS) in the recycled PS properties.The recycled PS and biodegradables polymers blends were evaluated by measuring the VST, MFI, FTIR and mechanical properties.