Damping properties of acrylate polymers mediated by ionic coordination

Abstract

In this work, metallic ions are introduced to polyacrylates to break the mutual limitation between damping peak width and height. It is found that all the ion-coordinated polymers exhibit two loss peaks. With the increase of concentration, coordination strength, and steric hindrance, the temperature gap between two damping peaks can be broadened significantly while the peak height is slightly decreased. We are surprised to find that the effective damping temperature region (peak height ≥0.3) for poly (butyl acrylate) ionomers with 100% neutralization and weak coordination strength can be more than 200 K. Moreover, the damping peak area also increases after the introduction of metallic ions. Our result provides a new strategy for developing novel damping materials with high performance.

Tuning the Dynamic Fragility of Polymers by Metallic Ions: The Interplay of Coordination Strength

“…Ionomers sometimes suffer from chemical nonhomogeneity . Ionic groups tend to aggregate to form nanoscale clusters due to the difference in the polarities of hydrocarbon bulk and ionic groups and the electrostatic interactions. − However, small-angle X-ray scattering shows that the ion-coordinated PVP complexes studied in this work are homogeneous without nanophase separation, as illustrated in Figure S1.…”

Multiple energy dissipation modes in dynamic polymer networks with neutral and ionic junctions

“…24,29 Ionomers are another class of materials used extensively in damping applications. [30][31][32][33][34][35] The microphase separation of ionic clusters from the backbone gives rise to heterogeneity which leads to broader loss tangents and efficient dissipation. Such clusters can also exchange ionic groups, which ultimately leads to flow and a dynamic process that can lead to an increase in tan d. Dynamic bonds bearing ionic charges have been investigated in polymer networks but not in the context of their damping performance.…”