Modification of macromolecular dynamics in polyacrylic hybrid nanocomposite with un-treated SiO2 nanoparticles

Hernández-Vargas, Mireya Lizbeth; Castillo‐Pérez, Rubén; Flores‐Cedillo, Osvaldo; Campillo-Illanes, Bernardo Fabián

doi:10.1016/j.mseb.2020.114976

Cited by 2 publications

(1 citation statement)

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“…A noticeable increase in microhardness and fracture toughness of nanocomposite with nanosized inclusions is described in [6]. The effect of Young's modulus values increasing by almost 20% was found in [7] and an increase in the elastic modulus and yield stresses was shown in [8]. In [9] and [10], the effect of a significant change in the frictional performance of PNCs with the addition of carbon nanofibers and other nanoscale fillers was shown.…”

Section: Introductionmentioning

confidence: 89%

Numerical Model of a Local Contact of a Polymer Nanocomposite and Its Experimental Validation

Дмитриев

2021

FU Mech Eng

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In the paper a model of a local contact of a polymer-based nanocomposite was developed within the method of a movable cellular automaton. The features of mechanical behavior of nanocomposite at the mesoscale level under dry sliding were studied with explicit account for the microprofile of the counterbody surface and the characteristic sizes of nanofiller. Factors that contribute to the conditions for the formation of a stable tribofilm of silica nanoparticles are analyzed. Two other parameters like sample geometry and the value of relative sliding velocity are also examined. It is shown that the thickness of tribofilm depends on stress conditions at the contact, and the friction coefficient decreases with increasing sliding velocity similar to one observed experimentally. To ensure the low friction properties of polymer nanocomposite, particles whose sizes are comparable with the characteristic size of the substrate microprofile are preferred. Results of numerical simulation are in good correlation with available experimental data.

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