By the method of free-radical polymerization in solution, cross-linked copolymer of sodium acrylate and acrylic acid of super-high molecular weight.

Thermal control is much easier in solution polymerization compared to bulk polymerization.

One starch graft acrylamide copolymer was synthesized by graft copolymerization of starch and acrylamide in solution, and the polymerization kinetics and its mechanism was discussed.