Nonionic polyacrylamide water dispersion was prepared using acrylamide as monomer,ammonium persulfate as initiator,sodium hypophosphite and itaconic acid as chain transfer agent,sodium polyacrylate as the stabilizer,ammonium sulfate and sodium chloride solution as reaction medium by water dispersion polymerization.The effects of sodium chloride,chain transfer agent,stabilizer on viscosity,molecular weight and particle morphology of the product were investigated.Lowviscosity and longtime-stable product can b...