Influence of the microstructural morphology on the mechanical properties of high-impact polystyrene

摘要

The stress-strain and dynamic mechanical curves and impact strength of different high-impact polystyrenes (HIPS) have been studied as a function of their microstructure. We have found that the values of the Young and dynamic moduli are very similar since damping of these materials is minor at room temperature. Also, we have found that both moduli depend on particle volume fraction. The impact strength improves to a larger extent with the incorporation of polybutadiene into polystyrene However, this improvement depends also on the morphology of the material. The impact strength is affected largely by the rubber particle size. We have found that the impact energy absorbed is proportional to the ligament area