A series of random copolymers of sodium acrylate and oligo (ethylene oxide) alkyl ether methacrylates (C n E m MA) with different lengths of ethylene oxide (EO) and alkyl groups were prepared by free-radical copolymerization at varying copolymer compositions. The lengths of the EO units (the number of EO units)(m) and the numbers of carbon atoms in the alkyl groups (n) ranged from 0 to 8.7 and 1 to 6, respectively. The copolymers with n= 1 ...
