Effects of compatibility in rubber/polypropylene blends

The solubility behavior of various elastomer additives, i.e. processing pro moters (PRMs) was studied in EPDM, NBR and PP by using thermoanalytical and dynamic-mechanical methods. Binary rubber/thermoplastic blends containing selected PRM types were then investigated with regard to phase morphology, compatibilization and related final properties. The incorporation of some a dditives resulted in significant effects on the physical characteristics of the mixtures. It was demonstrated that the PRMs act as effective homogeniz ing agents, contributing to considerably improved dispersion and compatibil ity of the blend components.