Inverse emulsion copolymerization of sodium acrylate (NaAA)

acrylamide (AM)

and acryloyloxyethyl trimethylammonium chloride (DAC)was investigated

using Span80-Tween80 as complex emulsifier and 2

2′-azobis-(2-amidinopropen)-dihydrochloride (AIBA) as initiator.The effects of polymerization temperature

initiator dosage

monomer concentration and composition of both DAC and AM

emulsifier content and HLB value

oil/water ratio

aqueous pH value on the polymerization conversion and the polymer intrinsic viscosity were studied.During the preparation process of the amphoteric polyacrylamide

the gel effect was evident from the increase of polymer intrinsic viscosity with increasing initiator dosage and comonomer concentration.The latex particle size of the amphoteric polyacrylamide emulsion was observed with a scanning electron microscope

and the structure of the amphoteric polyacrylamide was identified by FTIR spectroscopy.