All the previous analysis was conducted using the same solvent viscosity (friction coefficient chosen to match diffusion of CG and AA monomers in DCB) in order to facilitate comparison between different solvent qualities. However, the viscosity of toluene (0.560 mPa•s at 25°C) is approximately half that of DCB (1.324 mPa•s at 25°C). It is therefore important that the effect of viscosity on the competition between single-chain folding and multi-chain aggregation be considered, as it should affect the rates of both processes. Based on the theory presented in the ESI (Section S9), the rates of both single-chain folding and multi-chain aggregation are expected to scale linearly with viscosity, as they both depend on the diffusion coefficient of either the monomer or polymer, which from the Stokes-Einstein equation are inversely proportional to solvent viscosity.