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      Development of Dispersion during Compounding and Extrusion of Polypropylene/Graphite Nanoplates Composites

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          Abstract

          Carbon-based nanoparticles have unique electrical, thermal, barrier and mechanical properties. When incorporated into polymer matrices, the resulting nanocomposites are potentially suitable for a wide scope of advanced applications. In practice, the properties of the nanocomposites are strongly determined by the level of dispersion achieved and by the degree of polymer/particle interfacial bonding. Production and processing of nanocomposites are often carried out in successive thermo-mechanical cycles. These may change the state of nanoparticle dispersion. This work analyzes the evolution of the dispersion of graphite nanoplates (GnP) in a polypropylene matrix during compounding in a co-rotating twin screw extruder and subsequent processing in a single screw extruder, aiming at a better understanding of the kinetics and stability of dispersion. Dispersion was evaluated along the compounding and processing stages and correlated with the composite electrical conductivity, an important engineering property. Two commercial GnP were used as received and chemically modified to graft PP-g-MA (fGnP-PP). Compositions with 2 or 10 wt.% of GnP and fGnP-PP were studied.

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          Most cited references 28

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          Small but strong: A review of the mechanical properties of carbon nanotube–polymer composites

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            Graphene based materials: Past, present and future

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              Crystallization and orientation studies in polypropylene/single wall carbon nanotube composite

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                Author and article information

                Journal
                ipp
                International Polymer Processing
                Carl Hanser Verlag
                0930-777X
                2195-8602
                17 November 2017
                : 32
                : 5
                : 614-622
                Affiliations
                1 Institute for Polymers and Composites/I3 N, University of Minho, Guimarães, Portugal
                Author notes
                [* ] Correspondence address, Mail address: José A. Covas, Institute for Polymers and Composites/I3N, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal, E-mail: jcovas@ 123456dep.uminho.pt
                Article
                IPP3485
                10.3139/217.3485
                © 2017, Carl Hanser Verlag, Munich
                Page count
                References: 30, Pages: 9
                Product
                Self URI (journal page): http://www.hanser-elibrary.com/loi/ipp
                Categories
                Special Issue Contributions

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