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The composition of each group in the polyaspartamide copolymers was determined from the integration ratio between methyl proton of isopropyl amine δ=0.91-1.14 (DIAPEA, 12H) and methylene proton adjacent to OH δ=3.48-3.6 (EA, 2H) in the1H-NMR.
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Moon, J.R., Kim, JH. Biodegradable thermo- and ph-responsive hydrogels based on amphiphilic polyaspartamide derivatives containingN,N-Diisopropylamine pendants. Macromol. Res. 16, 489–491 (2008). https://doi.org/10.1007/BF03218549
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DOI: https://doi.org/10.1007/BF03218549