Influence of nanoparticle size, loading, and shape on the mechanical properties of polymer nanocomposites

Abstract

Articles you may be interested inEffects of size and interparticle interaction of silica nanoparticles on dispersion and electrical conductivity of silver/epoxy nanocomposites J. Appl. Phys. 115, 154307 (2014) Influence of nanoparticle size, loading, and shape on the mechanical properties of polymer nanocomposites We study the influence of spherical, triangular, and rod-like nanoparticles on the mechanical properties of a polymer nanocomposite (PNC), via coarse-grained molecular dynamics simulations. We focus on how the nanoparticle size, loading, mass, and shape influence the PNC's elastic modulus, stress at failure and resistance against cavity formation and growth, under external stress. We find that in the regime of strong polymer-nanoparticle interactions, the formation of a polymer network via temporary polymer-nanoparticle crosslinks has a predominant role on the PNC reinforcement. Spherical nanoparticles, whose size is comparable to that of the polymer monomers, are more effective at toughening the PNC than larger spherical particles. When comparing particles of spherical, triangular, and rod-like geometries, the rod-like nanoparticles emerge as the best PNC toughening agents.

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“…Insert Figure 12 here Nanoparticle size: Molecular dynamics simulations suggested that mechanical properties such as Young's and elastic modulus of NP-containing polymer composites improved with decreasing particle size at a constant NP concentration [213,214]. Reinforcement by NPs depends on the particle-polymer contact surface area [213].…”

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The effect of different parameters on mechanical properties of PA-6/clay nanocomposite through genetic algorithm and response surface methods

“…Therefore, the main objective of this study is using a powerful method to optimize material and processing conditions in the twin-screw compounding of PA-6/NC nanocomposites and evaluating their effects on mechanical properties which is not considered in detail in other reports. Moreover, notwithstanding the vast number of papers concerning PNCs, a few works have been devoted to investigate modeling the effect of different parameters on PNC mechanical properties [36,37]. More importantly, the studies that have dealt with mechanical properties were barely systematic, using the inefficient one-factor-at-atime (OFAT) approach and missing the interaction between factors.…”