Studies on microemulsion formed by polymer surfactants based on carboxy methyl cellulose

Polymeric surfactants were prepared by ultrasonic copolymerization of carbo xy methyl cellulose (CMC) and alkyl poly (etheroxy) acrylate. The polymeric microemulsion was prepared by mixing polymeric surfactants aqueous solutio n, toluene and alcohol at given ratios. The results of dynamic laser scatte ring indicated that the microemulsion droplets have almost: same size and c onformation, and the size of polymeric microemulsion particles, which is mu ch bigger than that of low molecular weight surfactants, is beyond the limi t of microemulsion definition. But the systems are still thermodynamically stable. The results of isotope tracer analysis indicated that more and more alcohol molecules insert to the interface of oil and water, changes the in terfacial structure of phases and finally help microemulsion formed. The wh ole structure of microemulsion is oil core surrounded by water. The formati on of reverse micelles is shown to be unlikely even in toluene-rich region.