Naslov
Polypropylene Blends with m-EPR Copolymers: Mechanical and Rheological Properties

Autori
Švab, Iztok ; Pustak, Anđela ; Denac, Matjaž ; Sever Škapin, Andrijana ; Leskovac, Mirela ; Musil, Vojko ; Šmit, Ivan

Izvornik
Acta chimica Slovenica (1318-0207) 65 (2018), 2; 344-353

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Isotactic polypropylene ; metallocene ethylene-propylene-based elastomers ; blends ; mechanical properties ; adhesion parameters

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo

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