Catalyst chose a diameter of 20 nm for the ionomer DEM particle. Nafion typically forms secondary aggregates in the order of 100s of nanometers , while carbon black particles are typically of 30-50 nanometers in diameter. Given these limitations, a size of 20 nanometers is hypothesised to provide a good balance of resolving features of desired length scales, while being large enough to simulate within reasonable cost. We also account for the effect of side-chainbackbone interactions by approximating them using colloidal interactions. The DLVO theory is used to represent side-chain repulsions using the repulsive electrostatic term, and represent polymer attraction using the attractive van der Waals term. In doing so, these interactions may also be altered as a function of the solvation medium, to study the effect of various polar/non-polar solvent compositions.