Aim\ To study the synthesis method of polyacrylamide and provide basis for industrialization. Methods\ Initiated by redox system and in the presence of emulsifier Span 80 and Op 4

the polymerization of acrylamide inverse emulsion was performed. Monomeric percentage of conversion measured by bromination and average molecular weight measured by viscosity method are also carried out. The effects on comprehensive performance of the polyacrylamide and polymeric technique are discussed. Results\ Percentage of conversion more than 80 percent and average molecular weight not less than 3×10 6 have been obtained by two kinds of methods. Conclusion\ The amount of initiator and ratio between oil and monomer affects remarkably the average molecular weight of polymer.