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research-article

Effect of Reprocessing on the Rheological, Electrical and Mechanical Properties of Polypropylene/Carbon Nanotube Composites

[+] Author and Article Information
Felicia Stan

Polymer Processing Research Center, Dunarea de Jos University of Galati 47 Domneasca, 800 008, Galati, Romania
felicia.stan@ugal.ro

Laurentiu Ionut Sandu

Polymer Processing Research Center, Dunarea de Jos University of Galati 47 Domneasca, 800 008, Galati, Romania
laurentiu.sandu@ugal.ro

Catalin Fetecau

Polymer Processing Research Center, Dunarea de Jos University of Galati 47 Domneasca, 800 008, Galati, Romania
catalin.feteca@ugal.ro

Razvan Rosculet

Polymer Processing Research Center, Dunarea de Jos University of Galati 47 Domneasca, 800 008, Galati, Romania
razvan.rosculet@ugal.ro

1Corresponding author.

ASME doi:10.1115/1.4035955 History: Received September 27, 2016; Revised January 31, 2017

Abstract

In this paper, polypropylene (PP) filled with different levels of multi-walled carbon nanotubes (MWCNTs) manufactured by injection molding was closed-loop recycled in order to investigate the effect of recycling and reprocessing on its rheological, electrical and mechanical properties. It was found that the PP/MWCNT composites keep the flow performance after mechanical recycling. Moreover, the stress and strain at break increase after one reprocessing cycle (mechanical recycling and injection molding) whereas no statistically significant changes in electrical conductivity, Young modulus and tensile strength of the PP/MWCNT composites filled with 1, 3 and 5 wt.% were observed.

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