A simple design of a vitrimer network with various fractions of bond exchangeable units for revisiting the Arrhenius dependence of relaxation properties

Abstract

In this study, we design a model-like vitrimer network with varying ester bond fractions, in which the bond exchange is operated via transesterification in the presence of internal amine catalysts. Other molecular parameters, such as the cross-link density, the fraction of OH groups, and the concentration of catalysts, are kept the same among samples. Based on this simple design, we provide some important insights into the dominating terms of the Arrhenius dependence of relaxation properties, such as the pre-exponential factor and the activation energy.