Figure 1From: Basic surface-active properties in the homologous series of β-alkyl (C12H25/C18H37) polyethyleneoxy (n = 0-20) propionamides The reaction scheme for the preparation of C 12 H 25 /C 14 H 29 (7/3) C 16 H 33 /C 18 H 37 (7/3) polyethyleneoxy (n = 3-20) propionamides. Back to article page