When monitoring the reaction, we observed a linear relationship between Mn exp and monomer conversion, which demonstrates that this polymerization proceeds through a chain-growth process (Figure ). Furthermore, plotting the natural log of monomer depletion versus time showed a linear relationship corresponding to well-behaved first-order kinetics (Figure ). Together, these results support that this reaction is characteristic of a well-controlled polymerization. We found that a variety of TDD monomers, including those with imide (1 and 6) or ester functionalities (7), result in efficient polymerization (Table ).