MORAIS, P. R. L.; MORAIS, Paulo Roberto Lucena de.
Abstract:
Incompatible blends such as polypropylene/high impact polystyrene have poor properties and, in these situations, compatibilizers are added in order to improve the blend's properties. In this work, the compatibilizing effect of two different styreneethylene/propylene diblock copolymers (Kraton G-1701 and G-1702), was investigated in a PP/HIPS (85:15) blend as well as an ternary PP/PEX/PSAI[(90:10):15]. The mechanical, physical, thermal and thermomechanical properties of these systems were determined as a function of compatibilizer content employed. SEM analysis of the samples was also undertaken. Both Kraton promoted a significant increase in the blend's impact strength without much loss in tensile strength and modulus of these systems. The Kraton G-1702 was more effective in improving the blend's impact properties.
