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Polypropylene blends with m-EPR copolymers : mechanical and rheological propertiesIztok Švab,
Anđela Pustak,
Matjaž Denac,
Andrijana Sever Škapin,
Mirela Leskovac,
Vojko Musil,
Ivan Šmit, 2018, izvirni znanstveni članek
Povzetek: The 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.
Ključne besede: isotactic polypropylene, metallocene ethylene-propylene-based elastomers, blend, mechanical properties, adhesion parameters
Objavljeno v DiRROS: 13.12.2023; Ogledov: 184; Prenosov: 90
Celotno besedilo (3,19 MB)
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