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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Abstract

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
Projects:	Project title Project leader Project code Project type Odnosi struktura-svojstvo modificiranih polimernih materijala- Irina Pucić 098-0982904-2955 MZOS
Depositing User:	Anđela Pustak
Date Deposited:	06 Dec 2018 08:57
URI:	http://fulir.irb.hr/id/eprint/4373
DOI:	10.17344/acsi.2017.4026

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