Abstract
A study about of the influence of CNTs elastic properties in polymer nanocomposites is presented. These properties are assumed to be dependent on the CNTs diameter and number of walls, identified as key characteristics of these reinforcements. The analysis is carried out using a micromechanical model based on the mean field homogenization theory for the prediction of the composite elastic properties of a MWCNT – epoxy resin system. A transversally isotropic elastic behavior has been considered for the CNTs based on values/dependencies reported in the literature. Interphase properties between the CNT and epoxy resin has been investigated by means of molecular dynamics simulations.
Highlights
In the past few years, carbon-based nanocomposites has attracted remarkably increasing interest owing to what they offer in terms of improvement of thermal, electrical and mechanical properties
From the analysis performed on the pure epoxy resin and in the epoxy resin-TWCNT nanocomposite, the information in Table 2 has been extracted
The results show that the sensitivity of the elastic constants to the carbon nanotubes (CNTs) diameter and number of walls is low, around 2.5% for the selected wt%
Summary
In the past few years, carbon-based nanocomposites has attracted remarkably increasing interest owing to what they offer in terms of improvement of thermal, electrical and mechanical properties. Due to their specific properties, nanoscale size, huge aspect ratio and surface area, the addition of carbon nanotubes (CNTs) can notably modify the polymers responses. Different number of walls can be obtained These parameters affect the CNTs reinforcement characteristics and, the resulting nanocomposite properties. In terms of the mechanical response, the influence of the CNTs diameter, length and number of walls in the elastic properties of CNTs has been studied in several works using different techniques. An analysis of their effects on the mechanical properties of CNT reinforced composites is valuable
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