High impact polystyrene (HIPS)/corn starch blends were prepared in presence of glycerol as a plasticizer via melt extrusion process by a twin-screw extruder. The novelty of this work is first. because of the use of pre-gelatinized corn starch as modified one and second. the procedure of making blends by extruder which makes it ease of access and also industrially possible. https://yeswellneses.shop/product-category/shower-gel/