Polypropylene blends with m-EPR copolymersŠvab, Iztok (Avtor) Pustak, Anđela (Avtor) Denac, Matjaž (Avtor) Sever Škapin, Andrijana (Avtor) Leskovac, Mirela (Avtor) Musil, Vojko (Avtor) Šmit, Ivan (Avtor) isotactic polypropylenemetallocene ethylene-propylene-based elastomersblendmechanical propertiesadhesion parametersThe effects of two metallocene ethylene-propylene-based elastomers (m-EPR1 and m-EPR2) differing in molecular mass and viscosity on mechanical, rheological and interfacial properties were compared. The m-EPR elastomers were added to iPP in 2.5, 5, 10, 15, and 20 vol.%. Torque values, elongation at break and impact strength measured of the iPP/m-EPR1 blends were higher than the iPP/m-EPR2 blends due to higher molten viscosity of m-EPR1 than m-EPR2 copolymer. Slight differences in Young moduli as well as in tensile strength at yield and at break might indicate that tensile properties of iPP/m-EPR blends were not significantly affected by difference in viscosity or molecular mass, miscibility and spherulite size. Optimization diagrams indicated the metallocene m-EPR copolymers are efficient impact modifiers for polypropylene and showed good balancing of mechanical properties in iPP/m-EPR blends.Slovensko kemijsko društvo20182023-12-13 08:10:34Neznano17545sl© authors, 2018