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Published in: Journal of Polymer Research 8/2016

01-08-2016 | Original Paper

Mechanical and rheological properties of silica-reinforced polypropylene/m-EPR blends

Authors: Anđela Pustak, Matjaž Denac, Andrijana Sever Škapin, Iztok Švab, Vojko Musil, Ivan Šmit

Published in: Journal of Polymer Research | Issue 8/2016

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Abstract

Rheological and mechanical properties (tensile and impact properties) as well as the mechanical profiles of ternary isotactic polypropylene/silica/elastomer (iPP/SiO2/m-EPR metallocene catalyzed ethylene-propylene rubber) composites were investigated and discussed. The effects of two metallocene ethylene-propylene-based elastomers (m-EPR) differing in molecular weight/viscosity and their content on iPP/silica composites with different silica types differing in size (nano- vs. micro-) and surface properties (untreated vs. treated) were investigated. The two m-EPR elastomers were added to iPP/SiO2 96/4 composites as possible impact modifier and compatibilizer at the same time in 5, 10, 15, and 20 vol% per hundred volume parts of composites. The effects of different silica fillers and two m-EPR rubbers were discussed within the context of structure-morphology-mechanical property relationships of these iPP/SiO2/m-EPR composites. Tensile and impact strength properties were mainly influenced by combined competetive effects of stiff filler and tough m-EPR elastomer so sinergistic effect was also observed. The ductility of these composites was affected additionally by spherulite size of the iPP matrix due to the difference in nucleation abilities of silica fillers enabled by prevailing separated morphology observed in iPP/SiO2/m-EPR composites.

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Metadata
Title
Mechanical and rheological properties of silica-reinforced polypropylene/m-EPR blends
Authors
Anđela Pustak
Matjaž Denac
Andrijana Sever Škapin
Iztok Švab
Vojko Musil
Ivan Šmit
Publication date
01-08-2016
Publisher
Springer Netherlands
Published in
Journal of Polymer Research / Issue 8/2016
Print ISSN: 1022-9760
Electronic ISSN: 1572-8935
DOI
https://doi.org/10.1007/s10965-016-1062-x

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