As incompletely overlapping chains are required to give a substantial increase in R g as aggregates grow, we first examined the number of overlaps between pairs of chains, N pair . Only chains with overlaps were counted so this variable has a minimum value of 1. Fig. shows the evolution of ⟨N pair ⟩ over time for 20mers in the three different solvent conditions studied. By approximately 1 µs, the average overlap fraction ⟨N pair ⟩/N of 20mers in the poor solvent has converged to 0.4 (8 overlaps) and does not appear to increase further over the rest of the simulation. This is well below the expected 100% overlap predicted previously as the equilibrium structure. In the "good" solvent, however, ⟨N pair ⟩/N is still increasing, albeit very slowly. In better solvents, we expect that chains are able to separate rapidly enough that less thermodynamically favourable structures, being those held together by only a few monomers, do not become kinetically trapped by the aggregation of more chains around them. Over time, this behaviour, where thermodynamically less favourable partially overlapping chains can separate, should give aggregates that tend toward the expected thermodynamic minimum of fully overlapping (⟨N pair ⟩/N = 1) chains. While Fig. suggests that this process may be occurring, especially in the "good" solvent, the time scale of this process appears to be too long to observe full rearrangement within the simulation duration. We have compared the behaviour in the "good" solvent with an equivalent system with lower friction to elucidate the equilibrium behaviour. This low-friction system showed greater overlaps between aggregated chains, indicating that when able, the system appears to converge towards the expected equilibrium (fully overlapping) behaviour.