Effects of recycling on mechanical and thermal properties of polystyrene

摘要

A commercial Polystyrene (M-w =2.5 10(5), MFI =14.80) was extruded repeatedly from one to eight times at 190 degrees C. The effects of extrusion process on physical and chemical properties of polystyrene were investigated using: Average molecular weight Izod Impact strength; Thermal properties (TGA, DTA). The results showed that processing of polystyrene leads to degradation. In fact, a decrease of 23% in the average molecular weight was observed for the 8(th) cycle sample and a reduction in impact strength by 34% was also noticed for the 4(th) cycle sample. [References: 4]