Thermal expansion of epoxide-amine networks in the glassy state

Atomistic modeling of thermomechanical properties of SWNT/Epoxy nanocomposites

“…The thermal expansion coefficient for the neat epoxy was obtained via an NPT simulation. The change in cell length with varying temperature is plotted with an experimentally measured dilatometric curve measured by Tcharkhtchi et al [46]. The experimental curve is in very good agreement with the MD calculated data, seen in figure 6.…”

“…The linear coefficient of thermal expansion between −50 °C to 150 °C is measured to be ± 54.4 2.7 μ °C−1 from this figure, with error bars shown later in figure 14. Thermal expansion at higher temperatures is plotted in figure 7 to show the glass transition temperature, which falls within the experimental range of 425-495 K for DGEBA/DDS [46].…”

Intermolecular interactions on amine‐cured epoxy matrices with different crosslink densities. Influence on the hole and specific volumes and the mechanical behavior

“…The different positions of the testing temperatures with respect to the T g values of each system in their glassy states affect both the hole and the specific volumes. [17][18][19][20][21] It is due to the mobility of the epoxy chains of the different systems increases with the proximity to their own T g .…”

“…A similar line can also be drawn for the specific volume values of this system assuming that its variation follows an expansion law derived from thermodynamics. 19,36 Changes in the gradient between the test temperature and T g had a significant influence on the hole volume. In the figure above described, it can be seen that the line representing the hole volume variation on the temperature for epoxy/diamine system goes up for lower gradient T g -RT values.…”

Study of temperature dependence of thermal conductivity in cross-linked epoxies using molecular dynamics simulations with long range interactions

“…This force field successfully predicted accurate thermodynamic properties of interest for epoxies in a previous study [6]. To compare the properties of the epoxy with experimental dilatometric data [23], the minimized cell was subject to NPT simulations at various temperatures. The change in cell length with temperature is superposed with the experimentally measured dilatometric curve reported in [23] in figure 4 and the data show good agreement.…”