Synthesis of BPA-free PC from DTMPC (100 mg, 0.33 mmol) by ROP under various conditions. A) Effect of amount of chain transfer (1,3-PDO) using 1.7 μmol DBU with 3.5 μmol (◆), 35 μmol (■), 70 μmol (▲), and 140 μmol (●) of 1,3PDO at 130°C. (B) Effect of chain transfers using 1.7 μmol DBU with 35 μmol 1,3PDO (◆), 35 μmol 1,2PDO (■) and 35 μmol 1,6HDO (▲) at 130°C.