Intrinsic viscosity measurements were performed on a series of model bottlebrush polymers, as described in Section 2.3. We plot these experimental results (filled symbols) as a function of molecular weight M in Figure , for bottlebrush molecules with M sc = 2237 Da and = 5220 Da, and also linear PNB. The simulation data for linear PNB fits a power-law behavior [η] ∼ M 0.73 , in close agreement with the Flory-Fox relationship consistent with the expectation for a coil in a good solvent. The corresponding experimental data yields [η] ∼ M 0.67 , which is slightly lower than the simulation result. Note that this is expected, as the simulation result pertains to a solution in athermal condition. The bottlebrush measurements M bb (Da) are consistent with previous literature, showing significant deviations from the Flory-Fox result at low M , with very little initial change in [η] with increasing M . We attribute this to the star-like nature of the low-M bb bottlebrush, with additional backbone monomers increasing the local density of branches rather than the overall aspect ratio of the molecule.