Fig. 1: Mechanism of ÐM-controlled ECT-ROP.
From: Dispersity-controlled ring-opening polymerization of epoxide

a Proposed pathway of ECT-ROP of epoxides comprising proton transfer (purple) and editable chain transfer (blue), with the angular velocities of the colored gears indicating the relative reaction rates. b Illustration of the mechanism for modular ECT-ROP, Rti is the chain-transfer rate at initiation stage, with the proportions of pie-charts indicating the weights of the three modules effecting ÐM control.