To synthesize ACM-labeled PCL 45 -b-PDMA 348 , ACM was coupled to the PCL 45 -b-PDMA 348 polymer backbone by esterification. In a typical coupling reaction, PCL 45 -b-PDMA 348 (200 mg, 1 eq), ACM (4.3 mg, 3 eq), DMAP (0.6 mg, 1 eq) and DCC (10.3 mg, 10 eq) were mixed in an ampule with 2 mL CHCl 3 . The solution was left stirring at room temperature for 2 days. The solution was then filtered, and the filtrate precipitated in diethyl ether three times and the resultant polymer was dried under vacuum.