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The synthesis process of the PEG-PCL-PEI polymer (A) and the 1H-NMR spectra of the polymers: (B) PEG-PCL, (C) PEG-PCL-COCHCH2, (D) PEI, (E) PEG-PCL-PEI.
Note: Dotted circle represented as enlarged position.
Abbreviations: DMF, N,N-dimethylformamide; NMR, nuclear magnetic resonance; PEG-PCL, polyethyleneglycol-co-polycaprolactone; PEG-PCL-PEI, polyethyleneglycol-co-polycaprolactone-co-polyethylenimine; PEI, polyethylenimine.
