Effect of Temperature and Catalyst Concentration on Polyglycerol during Synthesis
Table 4
Model of glycerol polymerization growing chain containing linear, branched, and cyclic segments and their carbons assignments by 13C NMR (see also Scheme 1) [12, 14, 17].
Carbon type ( 13C in ppm)
-CH2OH
-CHOH-
-CH2-O-
-CH-O-
60–64 ppm Polyglycerol terminal units (primary hydroxyl groups)