Figure 2.

Characterization of the copolymers obtained by the sequential approach: ¹H NMR spectra of a) the aliphatic macroinitiator PPDL (M_n = 2,200 g mol^-1, PDI = 1.88), and b) the PPDL-ester-P2HEB copolymer (M_n = 9,800 g mol^-1, PDI = 1.28) recorded in CDCl₃ at 250 MHz. c) and d) GPC elugrams of the PPDL-ester-P2HEB copolymers (black line) and their corresponding aliphatic macroinitiators PPDL (dashed line). Two copolyesters with a molecular mass of c) 9,800 g mol^-1 (M_{n,macroinitiator} = 2,200 g mol^-1) and d) 16,000 g mol^-1 (M_{n,macroinitiator} = 8,900 g mol^-1) were synthesized.