Abstract: The new initiating system for synthesis of acrylamide-based polymers has attracted much attention and been the focus of increasing polymer molecular weight in recent years. The performance of polymerization, charac-teristic and range of application of aqueous azo initiator has been investigated and the aqueous azo initiators can be used for the preparation of high molecular weight acrylamide-based polymers and its derivatives, which demonstrates
abroad application prospect. The effect of difunctional initiator and amino functional monomer on molecular weight are also discussed. The initiating system of the new kind of cryogenic compound initiators containing potassium
persulfate, ammonia water, urea, azo-(2-amidinopropane) dihydrochloride, functional monomer MP are believed to be able to be used for the preparation of ultrahigh molecular weight acrylamide-based polymers.

Key words: acrylamide, aqueous azo-initiator, difunctional initiator, amino functional monomer, complex initiation system