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

Švab, Iztok; Pustak, Anđela; Denac, Matjaž; Sever Škapin, Andrijana; Leskovac, Mirela; Musil, Vojko; Šmit, Ivan (2018) Polypropylene Blends with m-EPR Copolymers: Mechanical and Rheological Properties. Acta chimica Slovenica, 65 (2). pp. 344-353. ISSN 1318-0207

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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.

Item Type: Article
Uncontrolled Keywords: Isotactic polypropylene ; metallocene ethylene-propylene-based elastomers ; blends ; mechanical properties ; adhesion parameters
Subjects: NATURAL SCIENCES > Chemistry
Divisions: Division of Materials Chemistry
Project titleProject leaderProject codeProject type
Odnosi struktura-svojstvo modificiranih polimernih materijala-Irina Pucić098-0982904-2955MZOS
Depositing User: Anđela Pustak
Date Deposited: 06 Dec 2018 08:57
DOI: 10.17344/acsi.2017.4026

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