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Open AccessArticle

The Effects of Geometry and Chemical Composition of Nanoparticles on The Fracture Toughness of iPP Nanocomposites

by Nadya Stern 1,2,*, Xiao Hu 2 and Gad Marom 1
1
The Institute of Chemistry, The Casali Center of Applied Chemistry and the Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
2
School of Materials Science & Engineering, Nanyang Technological University, Singapore 639798, Singapore
*
Author to whom correspondence should be addressed.
J. Compos. Sci. 2020, 4(1), 24; https://doi.org/10.3390/jcs4010024
Received: 24 December 2019 / Revised: 28 January 2020 / Accepted: 24 February 2020 / Published: 29 February 2020
(This article belongs to the Special Issue Recent Advances in Carbon Nanotube Composites)
This research deals with possible hybrid effects in the fracture energy of hybrid nanocomposites while taking a critical approach toward the currently-prevailing engineering practice of applying classical composite micromechanics to nanocomposites. For this purpose, different nanoparticles were embedded in an isotactic polypropylene matrix. The particles had different geometries (fibrous and platelets) and different chemical structures (organic vapor grown carbon nanofibers (VGCF); graphene nanoplatelets (GNP); and inorganic nanoclays, SiO2 nanofibers, and ZrO2 nanofibers). Almost all the composite systems presented improvements in the fracture energy, whereas the iPP/VGCF/GNP presented a positive hybrid effect. The main conclusion was that each nanocomposite system should be analyzed individually according to the constituent properties; the quality of the dispersion; and, primarily, by the type of interaction between the particles and the matrix. View Full-Text
Keywords: nanocomposites; hybrid; toughness; polymers nanocomposites; hybrid; toughness; polymers
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Stern, N.; Hu, X.; Marom, G. The Effects of Geometry and Chemical Composition of Nanoparticles on The Fracture Toughness of iPP Nanocomposites. J. Compos. Sci. 2020, 4, 24.

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