Charge Transport and Glassy Dynamics in Blends Based on 1-Butyl-3-vinylbenzylimidazolium Bis(trifluoromethanesulfonyl)imide Ionic Liquid and the Corresponding Polymer

Charge transport, diffusion properties, and glassy dynamics of blends of imidazolium-based ionic liquid (IL) and the corresponding polymer (polyIL) were examined by Pulsed-Field-Gradient Nuclear Magnetic Resonance (PFG-NMR) and rheology coupled with broadband dielectric spectroscopy (rheo-BDS). We found that the mechanical storage modulus [Formula: see text] increases with an increasing amount of polyIL and [Formula: see text] is a factor of 10,000 higher for the polyIL compared to the monomer ([Formula: see text] = [Formula: see text] Pa at 100 rad s(−1) and 298 K). Furthermore, the ionic conductivity [Formula: see text] of the IL is a factor [Formula: see text] higher than its value for the polymerized monomer with [Formula: see text] S cm(−1) at [Formula: see text] K. Additionally, we found the Haven Ratio ([Formula: see text] obtained through PFG-NMR and BDS measurements to be constant around a value of [Formula: see text] for the IL and blends with 30 wt% and 70 wt% polyIL. These results show that blending of the components does not have a strong impact on the charge transport compared to the charge transport in the pure IL at room temperature, but blending results in substantial modifications of the mechanical properties. Furthermore, it is highlighted that the increase in [Formula: see text] might be attributed to the addition of a more mobile phase, which also possibly reduces ion-ion correlations in the polyIL.