| abstract |
ABSTRACT A method for preparing an aqueous polyacrylamide solution is described. The method comprises: - hydrating acrylonitrile in water in the presence of a biocatalyst capable of converting acrylonitrile to acrylamide in order to obtain an acrylamide solution, - directly polymerizing the acrylamide solution in order to obtain a polyacrylamide gel, and - dissolving directly the polyacrylamide gel by the addition of water in order to obtain an aqueous polyacrylamide solution, wherein the polyacrylamide gel is dissolved by water jet cutting. |