3.5 Bottlebrush shape Dynamic quantities such as R h and [η] provide straightforward ways to compare between computation and experiment, and the structural measure of R g can be compared via scattering methods not pursued in this investigation. Interpretation of these accessible quantities, however, are related to the shape of the bottlebrush. Shape information has been investigated in part by prior works using theory and neutron scattering, and has also been implicated in explaining the low viscosity of bottlebrush melts. 116 However, full architectural information from simulation provides the opportunity to directly characterize shape using a number of measures: (i) asphericity, which quantifies the deviation of a shape from a sphere, and (ii) prolateness, which quantifies the degree of oblateness or prolateness of a shape.